metynodiol metynodiol metynodiol (inn), or methynodiol, also known as 11β-methyletynodiol, is a steroidal progestin of the 19-nortestosterone group that was synthesized in the 1960s but was never marketed. a diacetate ester, metynodiol diacetate (sc-19198), also exists. metynodiolclinical dataother names11β-methyl-19-norpregn-4-en-20-yne-3β,17α-diol; (3β,11β,17β)-17-ethynyl-11-methylestr-4-ene-3,17-diolidentifiers iupac name (1s,2r,5s,10r,11s,14r,15s,17s)-14-ethynyl-15,17-dimethyltetracycloheptadec-6-ene-5,14-diol cas number23163-42-0pubchem cid10018547chemspider8194120uniiry422150vycomptox dashboard (epa)dtxsid60177742 chemical and physical dataformulac21h30o2molar mass314.469 g·mol−13d model (jsmol)interactive image smiles cc1cc2(c(ccc2(c#c)o)c3c1c4ccc(c=c4cc3)o)c inchi inchi=1s/c21h30o2/c1-4-21(23)10-9-18-17-7-5-14-11-15(22)6-8-16(14)19(17)13(2)12-20(18,21)3/h1,11,13,15-19,22-23h,5-10,12h2,2-3h3/t13-,15-,16-,17-,18-,19+,20-,21-/m0/s1key:dltwuxudifvvom-osfpvtnasa-n