Related literature {#sec1}
==================

For bond-length data, see: Allen *et al.* (1987[@bb1]). For related literature on hydrogen-bond motifs, see: Bernstein *et al.* (1995[@bb2]). For background to and activities of etizolam and thio­phene derivatives, see: Gewald & Schindler (1990[@bb7]); Jagadees Babu *et al.* (2011[@bb8]); Shafeeque *et al.* (1999[@bb13]); Nakamura & Mukasa (1992[@bb9]); Nakanishi *et al.* (1973[@bb10]); Ramanathan & Namboothiri (1978[@bb12]). For related structures, see: Dockendorff *et al.* (2006[@bb5]); Ferreira de Lima *et al.* (2009[@bb6]); Nogueira *et al.* (2010[@bb11]). For the stability of the temperature controller, see: Cosier & Glazer (1986[@bb4]).

Experimental {#sec2}
============

 {#sec2.1}

### Crystal data {#sec2.1.1}

C~15~H~15~ClN~2~O~2~S*M* *~r~* = 322.80Monoclinic,*a* = 13.9784 (11) Å*b* = 13.5565 (11) Å*c* = 8.3334 (7) Åβ = 91.233 (1)°*V* = 1578.8 (2) Å^3^*Z* = 4Mo *K*α radiationμ = 0.38 mm^−1^*T* = 293 K0.56 × 0.41 × 0.28 mm

### Data collection {#sec2.1.2}

Bruker APEX DUO CCD area-detector diffractometerAbsorption correction: multi-scan (*SADABS*; Bruker, 2009[@bb3]) *T* ~min~ = 0.817, *T* ~max~ = 0.90216034 measured reflections4184 independent reflections3180 reflections with *I* \> 2σ(*I*)*R* ~int~ = 0.020

### Refinement {#sec2.1.3}

*R*\[*F* ^2^ \> 2σ(*F* ^2^)\] = 0.049*wR*(*F* ^2^) = 0.163*S* = 1.054184 reflections191 parametersH-atom parameters constrainedΔρ~max~ = 0.47 e Å^−3^Δρ~min~ = −0.28 e Å^−3^

 {#d5e539}

Data collection: *APEX2* (Bruker, 2009[@bb3]); cell refinement: *SAINT* (Bruker, 2009[@bb3]); data reduction: *SAINT*; program(s) used to solve structure: *SHELXTL* (Sheldrick, 2008[@bb14]); program(s) used to refine structure: *SHELXTL*; molecular graphics: *SHELXTL*; software used to prepare material for publication: *SHELXTL* and *PLATON* (Spek, 2009[@bb15]).

Supplementary Material
======================

Crystal structure: contains datablock(s) global, I. DOI: [10.1107/S1600536812003261/is5060sup1.cif](http://dx.doi.org/10.1107/S1600536812003261/is5060sup1.cif)

Structure factors: contains datablock(s) I. DOI: [10.1107/S1600536812003261/is5060Isup2.hkl](http://dx.doi.org/10.1107/S1600536812003261/is5060Isup2.hkl)

Supplementary material file. DOI: [10.1107/S1600536812003261/is5060Isup3.cml](http://dx.doi.org/10.1107/S1600536812003261/is5060Isup3.cml)

Additional supplementary materials: [crystallographic information](http://scripts.iucr.org/cgi-bin/sendsupfiles?is5060&file=is5060sup0.html&mime=text/html); [3D view](http://scripts.iucr.org/cgi-bin/sendcif?is5060sup1&Qmime=cif); [checkCIF report](http://scripts.iucr.org/cgi-bin/paper?is5060&checkcif=yes)

Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: [IS5060](http://scripts.iucr.org/cgi-bin/sendsup?is5060)).

ASD thanks the University of Mysore for research facilities. SC thanks the Prince of Songkla University for generous support. The authors thank the Universiti Sains Malaysia for the Research University grant No. 1001/PFIZIK/811160.

Comment
=======

The title compound is an intermediate in the synthesis of a drug known as \"etizolam\" which possesses potent hypnotic properties (Nakamura & Mukasa, 1992). Thiophenes and their biheterocycles have received considerable attention during last two decades as they are endowed with variety of biological activities and have wide range of therapeutic properties (Gewald & Schindler, 1990; Ramanathan & Namboothiri, 1978). Thiophene derivatives possess different pharmacological and biological properties, of which the more potent properties are the anticonvulsant, anti-inflammatory and antibacterial activities (Jagadees Babu *et al.*, 2011; Shafeeque *et al.*, 1999). In view of the importance of thiophenes, the crystal structure of the title compound (I) is reported.

In the molecule of (I), C~15~H~15~ClN~2~O~2~S, the central thiophene ring makes a dihedral angle of 88.11 (11)° with the 2-chlorophenyl ring. The 2-aminoacetamide moiety is co-planar with the thiophene ring with an r.m.s. deviation of 0.067 (2) Å for the ten non-H atoms (C8--C11/C14-C15, S1, O2 N1 and N2) (Fig. 1) and with torsion angles C9--N1--C14--O2 = -1.6 (3)°, C9--N1--C14--C15 = 178.49 (18)° and N1--C14--C15--N2 = -6.9 (3)°. The orientation of the ethyl group with respect to the thiophene ring can be reflected by the torsion angle C11--C10--C12--C13 = 118.6 (4)° which indicates the (+)-anti-clinal conformation. An intramolecular N1---H1N1···O1 hydrogen bond generates an S(6) ring motif (Bernstein *et al.*, 1995). Bond distances of (I) are in normal range (Allen *et al.*, 1987) and comparable with the related structures (Dockendorff *et al.*, 2006; Ferreira de Lima *et al.*, 2009; Nogueira *et al.*, 2010).

In the crystal packing (Fig. 2), the molecules are linked by intermolecular N---H···O(acetamide) hydrogen bonds and weak C---H···O(acetamide) interactions (Table 1) into chains along the *c* axis. Weak C---H···π interactions are present (Table1).

Experimental {#experimental}
============

The title compound was synthesized by the literature method (Nakanishi *et al.*, 1973). Yellow block-shaped single crystals of the title compound suitable for *X*-ray structure determination were recrystalized from C~2~H~5~OH/DMSO (1:1 *v*/*v*) by slow evaporation of the solvent at room temperature after several days (m.p. 417--419 K).

Refinement {#refinement}
==========

All H atoms were positioned geometrically and allowed to ride on their parent atoms, with d(N---H) = 0.83 Å for NH, 0.87 Å for NH~2~, and d(C---H) = 0.93 Å for aromatic, 0.97 Å for CH~2~ and 0.96 Å for CH~3~ groups. The *U*~iso~(H) values were constrained to be 1.5*U*~eq~ of the carrier atom for methyl H atoms and 1.2*U*~eq~ for the remaining H atoms. A rotating group model was used for the methyl groups.

Figures
=======

![The molecular structure of the title compound, showing 40% probability displacement ellipsoids and the atom-numbering scheme. The intramolecular N---H···O hydrogen bond is shown as a dash line.](e-68-0o547-fig1){#Fap1}

![The crystal packing of the title compound viewed along the a axis, showing a chain running along the c axis. Hydrogen bonds are shown as dashed lines.](e-68-0o547-fig2){#Fap2}

Crystal data {#tablewrapcrystaldatalong}
============

  ------------------------- ---------------------------------------
  C~15~H~15~ClN~2~O~2~S     *F*(000) = 672
  *M~r~* = 322.80           *D*~x~ = 1.358 Mg m^−3^
  Monoclinic, *P*2~1~/*c*   Melting point = 417--419 K
  Hall symbol: -P 2ybc      Mo *K*α radiation, λ = 0.71073 Å
  *a* = 13.9784 (11) Å      Cell parameters from 4184 reflections
  *b* = 13.5565 (11) Å      θ = 1.5--29.0°
  *c* = 8.3334 (7) Å        µ = 0.38 mm^−1^
  β = 91.233 (1)°           *T* = 293 K
  *V* = 1578.8 (2) Å^3^     Block, yellow
  *Z* = 4                   0.56 × 0.41 × 0.28 mm
  ------------------------- ---------------------------------------

Data collection {#tablewrapdatacollectionlong}
===============

  ------------------------------------------------------------ --------------------------------------
  Bruker APEX DUO CCD area-detector diffractometer             4184 independent reflections
  Radiation source: sealed tube                                3180 reflections with *I* \> 2σ(*I*)
  graphite                                                     *R*~int~ = 0.020
  φ and ω scans                                                θ~max~ = 29.0°, θ~min~ = 1.5°
  Absorption correction: multi-scan (*SADABS*; Bruker, 2009)   *h* = −18→19
  *T*~min~ = 0.817, *T*~max~ = 0.902                           *k* = −18→17
  16034 measured reflections                                   *l* = −11→11
  ------------------------------------------------------------ --------------------------------------

Refinement {#tablewraprefinementdatalong}
==========

  ------------------------------------- ------------------------------------------------------------------------------------------------
  Refinement on *F*^2^                  Primary atom site location: structure-invariant direct methods
  Least-squares matrix: full            Secondary atom site location: difference Fourier map
  *R*\[*F*^2^ \> 2σ(*F*^2^)\] = 0.049   Hydrogen site location: inferred from neighbouring sites
  *wR*(*F*^2^) = 0.163                  H-atom parameters constrained
  *S* = 1.05                            *w* = 1/\[σ^2^(*F*~o~^2^) + (0.079*P*)^2^ + 0.4642*P*\] where *P* = (*F*~o~^2^ + 2*F*~c~^2^)/3
  4184 reflections                      (Δ/σ)~max~ = 0.001
  191 parameters                        Δρ~max~ = 0.47 e Å^−3^
  0 restraints                          Δρ~min~ = −0.28 e Å^−3^
  ------------------------------------- ------------------------------------------------------------------------------------------------

Special details {#specialdetails}
===============

  ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
  Experimental. The crystal was placed in the cold stream of an Oxford Cryosystems Cobra open-flow nitrogen cryostat (Cosier & Glazer, 1986) operating at 100.0 (1) K.
  Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds involving l.s. planes.
  Refinement. Refinement of F^2^ against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F^2^, conventional R-factors R are based on F, with F set to zero for negative F^2^. The threshold expression of F^2^ \> 2sigma(F^2^) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F^2^ are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger.
  ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å^2^) {#tablewrapcoords}
==================================================================================================

  ------ --------------- --------------- -------------- -------------------- --
         *x*             *y*             *z*            *U*~iso~\*/*U*~eq~   
  Cl1    0.44203 (5)     0.00271 (7)     0.78182 (12)   0.1059 (3)           
  S1     0.12494 (4)     0.13080 (4)     1.17920 (6)    0.06549 (19)         
  O1     0.19142 (11)    −0.04825 (14)   0.72869 (17)   0.0736 (5)           
  O2     −0.03578 (13)   0.17865 (14)    1.0035 (2)     0.0834 (5)           
  N1     0.06864 (11)    0.08376 (12)    0.87282 (19)   0.0516 (4)           
  H1N1   0.0845          0.0597          0.7864         0.062\*              
  N2     −0.02762 (16)   0.09813 (17)    0.5929 (3)     0.0771 (5)           
  H1N2   −0.0804         0.0735          0.5496         0.093\*              
  H2N2   −0.0066         0.1416          0.5262         0.093\*              
  C1     0.40677 (15)    −0.11245 (19)   0.8517 (3)     0.0658 (5)           
  C2     0.47451 (19)    −0.1860 (3)     0.8745 (3)     0.0863 (8)           
  H2A    0.5387          −0.1741         0.8543         0.104\*              
  C3     0.4451 (2)      −0.2771 (2)     0.9274 (3)     0.0897 (8)           
  H3A    0.4899          −0.3274         0.9402         0.108\*              
  C4     0.3506 (2)      −0.2951 (2)     0.9617 (3)     0.0834 (7)           
  H4A    0.3319          −0.3566         0.9988         0.100\*              
  C5     0.28426 (17)    −0.22083 (18)   0.9404 (3)     0.0694 (6)           
  H5A    0.2206          −0.2324         0.9645         0.083\*              
  C6     0.31130 (13)    −0.12879 (15)   0.8834 (2)     0.0545 (4)           
  C7     0.23554 (13)    −0.05129 (16)   0.8577 (2)     0.0540 (4)           
  C8     0.21449 (13)    0.01234 (14)    0.9924 (2)     0.0506 (4)           
  C9     0.13424 (13)    0.07179 (14)    0.9968 (2)     0.0497 (4)           
  C10    0.23183 (18)    0.07790 (18)    1.2498 (3)     0.0677 (6)           
  C11    0.26932 (16)    0.01788 (16)    1.1402 (2)     0.0606 (5)           
  H11A   0.3258          −0.0171         1.1580         0.073\*              
  C12    0.2683 (3)      0.1027 (3)      1.4170 (3)     0.1028 (10)          
  H12A   0.2203          0.0829          1.4930         0.123\*              
  H12B   0.3253          0.0639          1.4394         0.123\*              
  C13    0.2909 (3)      0.2061 (3)      1.4438 (5)     0.1304 (15)          
  H13A   0.3160          0.2147          1.5510         0.196\*              
  H13B   0.2339          0.2450          1.4296         0.196\*              
  H13C   0.3378          0.2270          1.3684         0.196\*              
  C14    −0.01269 (14)   0.13727 (14)    0.8807 (3)     0.0568 (4)           
  C15    −0.07268 (15)   0.14234 (17)    0.7292 (3)     0.0642 (5)           
  H15A   −0.1331         0.1092          0.7468         0.077\*              
  H15B   −0.0865         0.2109          0.7050         0.077\*              
  ------ --------------- --------------- -------------- -------------------- --

Atomic displacement parameters (Å^2^) {#tablewrapadps}
=====================================

  ----- ------------- ------------- ------------- -------------- -------------- --------------
        *U*^11^       *U*^22^       *U*^33^       *U*^12^        *U*^13^        *U*^23^
  Cl1   0.0672 (4)    0.1184 (7)    0.1321 (7)    −0.0118 (4)    0.0012 (4)     0.0488 (5)
  S1    0.0777 (4)    0.0644 (3)    0.0544 (3)    −0.0016 (2)    0.0008 (2)     −0.0138 (2)
  O1    0.0712 (9)    0.1004 (12)   0.0487 (7)    0.0291 (9)     −0.0113 (6)    −0.0111 (7)
  O2    0.0772 (11)   0.0864 (12)   0.0864 (11)   0.0238 (9)     0.0016 (9)     −0.0235 (10)
  N1    0.0509 (8)    0.0529 (9)    0.0509 (8)    0.0057 (7)     −0.0018 (6)    −0.0039 (6)
  N2    0.0811 (13)   0.0784 (13)   0.0710 (12)   0.0116 (11)    −0.0191 (10)   −0.0050 (10)
  C1    0.0517 (10)   0.0825 (15)   0.0631 (12)   0.0085 (10)    −0.0008 (9)    0.0073 (11)
  C2    0.0599 (13)   0.119 (2)     0.0801 (16)   0.0295 (14)    −0.0003 (11)   0.0058 (16)
  C3    0.095 (2)     0.0887 (19)   0.0849 (17)   0.0402 (16)    −0.0130 (14)   −0.0049 (15)
  C4    0.099 (2)     0.0647 (14)   0.0851 (17)   0.0086 (13)    −0.0192 (14)   −0.0007 (12)
  C5    0.0655 (13)   0.0703 (14)   0.0720 (13)   −0.0003 (10)   −0.0114 (10)   0.0000 (11)
  C6    0.0497 (9)    0.0654 (12)   0.0483 (9)    0.0070 (8)     −0.0045 (7)    −0.0031 (8)
  C7    0.0470 (9)    0.0654 (11)   0.0494 (9)    0.0045 (8)     −0.0027 (7)    0.0002 (8)
  C8    0.0477 (9)    0.0560 (10)   0.0478 (9)    −0.0027 (7)    −0.0047 (7)    −0.0009 (7)
  C9    0.0518 (9)    0.0492 (9)    0.0480 (9)    −0.0050 (7)    −0.0003 (7)    −0.0030 (7)
  C10   0.0822 (14)   0.0698 (13)   0.0505 (10)   −0.0120 (11)   −0.0132 (10)   −0.0024 (9)
  C11   0.0608 (11)   0.0649 (12)   0.0555 (10)   −0.0065 (9)    −0.0135 (9)    0.0017 (9)
  C12   0.129 (3)     0.121 (2)     0.0574 (13)   −0.024 (2)     −0.0235 (15)   −0.0127 (15)
  C13   0.131 (3)     0.144 (3)     0.114 (3)     0.016 (2)      −0.040 (2)     −0.072 (3)
  C14   0.0534 (10)   0.0485 (10)   0.0686 (12)   0.0021 (8)     0.0015 (9)     −0.0005 (9)
  C15   0.0538 (11)   0.0601 (12)   0.0784 (14)   0.0042 (9)     −0.0054 (9)    0.0132 (10)
  ----- ------------- ------------- ------------- -------------- -------------- --------------

Geometric parameters (Å, °) {#tablewrapgeomlong}
===========================

  -------------------- -------------- ----------------------- --------------
  Cl1---C1             1.741 (3)      C5---C6                 1.390 (3)
  S1---C9              1.7248 (18)    C5---H5A                0.9300
  S1---C10             1.748 (3)      C6---C7                 1.504 (3)
  O1---C7              1.229 (2)      C7---C8                 1.451 (3)
  O2---C14             1.217 (3)      C8---C9                 1.382 (3)
  N1---C14             1.351 (2)      C8---C11                1.438 (3)
  N1---C9              1.376 (2)      C10---C11               1.338 (3)
  N1---H1N1            0.8253         C10---C12               1.511 (3)
  N2---C15             1.441 (3)      C11---H11A              0.9300
  N2---H1N2            0.8805         C12---C13               1.454 (5)
  N2---H2N2            0.8655         C12---H12A              0.9700
  C1---C6              1.384 (3)      C12---H12B              0.9700
  C1---C2              1.386 (3)      C13---H13A              0.9600
  C2---C3              1.376 (5)      C13---H13B              0.9600
  C2---H2A             0.9300         C13---H13C              0.9600
  C3---C4              1.379 (4)      C14---C15               1.502 (3)
  C3---H3A             0.9300         C15---H15A              0.9700
  C4---C5              1.378 (3)      C15---H15B              0.9700
  C4---H4A             0.9300                                 
                                                              
  C9---S1---C10        91.49 (10)     N1---C9---C8            125.22 (16)
  C14---N1---C9        125.06 (17)    N1---C9---S1            123.04 (14)
  C14---N1---H1N1      119.8          C8---C9---S1            111.74 (13)
  C9---N1---H1N1       114.9          C11---C10---C12         129.4 (3)
  C15---N2---H1N2      96.0           C11---C10---S1          111.37 (15)
  C15---N2---H2N2      112.5          C12---C10---S1          119.2 (2)
  H1N2---N2---H2N2     106.7          C10---C11---C8          114.0 (2)
  C6---C1---C2         121.2 (2)      C10---C11---H11A        123.0
  C6---C1---Cl1        119.25 (17)    C8---C11---H11A         123.0
  C2---C1---Cl1        119.6 (2)      C13---C12---C10         115.1 (3)
  C3---C2---C1         118.8 (3)      C13---C12---H12A        108.5
  C3---C2---H2A        120.6          C10---C12---H12A        108.5
  C1---C2---H2A        120.6          C13---C12---H12B        108.5
  C2---C3---C4         121.2 (2)      C10---C12---H12B        108.5
  C2---C3---H3A        119.4          H12A---C12---H12B       107.5
  C4---C3---H3A        119.4          C12---C13---H13A        109.5
  C5---C4---C3         119.3 (3)      C12---C13---H13B        109.5
  C5---C4---H4A        120.3          H13A---C13---H13B       109.5
  C3---C4---H4A        120.3          C12---C13---H13C        109.5
  C4---C5---C6         120.8 (2)      H13A---C13---H13C       109.5
  C4---C5---H5A        119.6          H13B---C13---H13C       109.5
  C6---C5---H5A        119.6          O2---C14---N1           121.8 (2)
  C1---C6---C5         118.6 (2)      O2---C14---C15          122.17 (19)
  C1---C6---C7         122.7 (2)      N1---C14---C15          116.03 (18)
  C5---C6---C7         118.68 (18)    N2---C15---C14          113.44 (17)
  O1---C7---C8         123.42 (18)    N2---C15---H15A         108.9
  O1---C7---C6         119.14 (18)    C14---C15---H15A        108.9
  C8---C7---C6         117.31 (16)    N2---C15---H15B         108.9
  C9---C8---C11        111.39 (17)    C14---C15---H15B        108.9
  C9---C8---C7         123.05 (16)    H15A---C15---H15B       107.7
  C11---C8---C7        125.47 (18)                            
                                                              
  C6---C1---C2---C3    1.0 (4)        C14---N1---C9---S1      −4.1 (3)
  Cl1---C1---C2---C3   −179.0 (2)     C11---C8---C9---N1      178.71 (18)
  C1---C2---C3---C4    −1.7 (4)       C7---C8---C9---N1       −4.8 (3)
  C2---C3---C4---C5    0.9 (4)        C11---C8---C9---S1      −1.3 (2)
  C3---C4---C5---C6    0.7 (4)        C7---C8---C9---S1       175.21 (15)
  C2---C1---C6---C5    0.6 (3)        C10---S1---C9---N1      −178.53 (17)
  Cl1---C1---C6---C5   −179.48 (17)   C10---S1---C9---C8      1.49 (16)
  C2---C1---C6---C7    −179.0 (2)     C9---S1---C10---C11     −1.31 (19)
  Cl1---C1---C6---C7   1.0 (3)        C9---S1---C10---C12     179.3 (2)
  C4---C5---C6---C1    −1.4 (3)       C12---C10---C11---C8    −179.9 (3)
  C4---C5---C6---C7    178.2 (2)      S1---C10---C11---C8     0.8 (3)
  C1---C6---C7---O1    92.5 (3)       C9---C8---C11---C10     0.3 (3)
  C5---C6---C7---O1    −87.0 (3)      C7---C8---C11---C10     −176.1 (2)
  C1---C6---C7---C8    −91.3 (2)      C11---C10---C12---C13   118.6 (4)
  C5---C6---C7---C8    89.1 (2)       S1---C10---C12---C13    −62.2 (4)
  O1---C7---C8---C9    10.0 (3)       C9---N1---C14---O2      −1.6 (3)
  C6---C7---C8---C9    −166.00 (18)   C9---N1---C14---C15     178.49 (18)
  O1---C7---C8---C11   −174.0 (2)     O2---C14---C15---N2     173.2 (2)
  C6---C7---C8---C11   10.0 (3)       N1---C14---C15---N2     −6.9 (3)
  C14---N1---C9---C8   175.84 (19)                            
  -------------------- -------------- ----------------------- --------------

Hydrogen-bond geometry (Å, °) {#tablewraphbondslong}
=============================

  ---------------------------------------------------------------
  *Cg*1 is the centroid of the thiophene C8/C9/S1/C10/C11 ring.
  ---------------------------------------------------------------

  ---------------------- --------- --------- ----------- ---------------
  *D*---H···*A*          *D*---H   H···*A*   *D*···*A*   *D*---H···*A*
  N1---H1N1···O1         0.83      2.15      2.771 (2)   132
  N2---H2N2···O2^i^      0.87      2.48      3.118 (3)   131
  C15---H15B···O2^i^     0.97      2.37      3.120 (3)   134
  C15---H15A···Cg1^ii^   0.97      2.75      3.530 (2)   238
  ---------------------- --------- --------- ----------- ---------------

Symmetry codes: (i) *x*, −*y*+1/2, *z*−1/2; (ii) −*x*, −*y*, −*z*+2.

###### Hydrogen-bond geometry (Å, °)

*Cg*1 is the centroid of the thio­phene C8/C9/S1/C10/C11 ring.

  *D*---H⋯*A*              *D*---H   H⋯*A*   *D*⋯*A*     *D*---H⋯*A*
  ------------------------ --------- ------- ----------- -------------
  N1---H1*N*1⋯O1           0.83      2.15    2.771 (2)   132
  N2---H2*N*2⋯O2^i^        0.87      2.48    3.118 (3)   131
  C15---H15*B*⋯O2^i^       0.97      2.37    3.120 (3)   134
  C15---H15*A*⋯*Cg*1^ii^   0.97      2.75    3.530 (2)   238

Symmetry codes: (i) ; (ii) .

[^1]: Thomson Reuters ResearcherID: A-3561-2009.

[^2]: Thomson Reuters ResearcherID: A-5085-2009.
