cl-4as-1 cl-4as-1 cl-4as-1 is a dual anabolic–androgenic steroid (aas) and 5α-reductase inhibitor. it is a potent and selective full agonist of the androgen receptor (ic50 = 12 nm) and inhibitor of 5α-reductase types i and ii (ic50 = 6 and 10 nm, respectively). structurally, cl-4as-1 is a 4-azasteroid. cl-4as-1clinical dataother namesn-(2-chlorophenyl)-3-oxo-4-aza-4-methylandrost-1-en-17α-carboxamideidentifiers iupac name (4aα,4bβ,6aα,7α,9aβ,9bα,11aβ)-n-(2-chlorophenyl)-2,4a,4b,5,6,6a,7,8,9,9a,9b,10,11,11a-tetradecahydro-1,4,6a-trimethyl-2-oxo-1h-indenoquinoline-7-carboxamide cas number188589-66-4pubchem cid9932961chemspider26232143chemical and physical dataformulac26h33cln2o2molar mass441.01 g·mol−13d model (jsmol)interactive image smiles c12cc3(1cc2c(=o)nc4=cc=cc=c4cl)cc53(c=cc(=o)n5c)c inchi inchi=1s/c26h33cln2o2/c1-25-14-12-18-16(8-11-22-26(18,2)15-13-23(30)29(22)3)17(25)9-10-19(25)24(31)28-21-7-5-4-6-20(21)27/h4-7,13,15-19,22h,8-12,14h2,1-3h3,(h,28,31)/t16-,17-,18-,19+,22+,25-,26+/m0/s1key:ctvxdpduokqbkz-gfnrtwgosa-n