α-chlorocodide α-chlorocodide α-chlorocodide is an opioid analog that is a derivative of codeine in which the 6-hydroxy group has been replaced by chlorine. α-chlorocodide names iupac name 6β-chloro-3-methoxy-17-methyl-7,8-didehydro-4,5α-epoxymorphinan systematic iupac name (4r,4ar,7r,7ar,12bs)-7-chloro-9-methoxy-2,3,4,4a,7,7a-hexahydro-1h-4,12-methanobenzofuroisoquinoline other names 6β-chloro-6-deoxycodeine6-chloro-6-deoxyisocodeine identifiers cas number 467-08-3 y 3d model (jsmol) interactive image chemspider 4588984 pubchem cid 5486612 unii 4ywu3we48h y comptox dashboard (epa) dtxsid10963637 inchi inchi=1s/c18h20clno2/c1-20-8-7-18-11-4-5-12(19)17(18)22-16-14(21-2)6-3-10(15(16)18)9-13(11)20/h3-6,11-13,17h,7-9h2,1-2h3/t11-,12+,13+,17-,18-/m0/s1key: cvlhoxttxweucl-kemuojqusa-ninchi=1/c18h20clno2/c1-20-8-7-18-11-4-5-12(19)17(18)22-16-14(21-2)6-3-10(15(16)18)9-13(11)20/h3-6,11-13,17h,7-9h2,1-2h3/t11-,12+,13+,17-,18-/m0/s1key: cvlhoxttxweucl-kemuojqubz smiles cl2\c=c/54n(cc51c3c(o12)c(oc)ccc3c4)c properties chemical formula c18h20clno2 molar mass 317.81 g·mol−1 melting point 151 to 154 °c (304 to 309 °f; 424 to 427 k) except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). infobox references