quingestanol quingestanol quingestanol (inn, ban), also known as norethisterone 3-cyclopentyl enol ether, is a progestin of the 19-nortestosterone group which was never marketed. it is a prodrug of norethisterone. an acylated derivative, quingestanol acetate, is used as a pharmaceutical drug. this article is about a non-clinically used progestin compound. for the pharmaceutical drug, see quingestanol acetate. quingestanolclinical dataother namesnorethisterone 3-cyclopentyl enol ether; 3-(cyclopentyloxy)-17α-ethynylestra-3,5-dien-17β-oldrug classprogestin; progestogenatc codeg03ac04 (who) g03aa02 (who) (with an estrogen)identifiers iupac name (8r,9s,10r,13s,14s,17r)-3-cyclopentyloxy-17-ethynyl-13-methyl-2,7,8,9,10,11,12,14,15,16-decahydro-1h-cyclopentaphenanthren-17-ol cas number10592-65-1pubchem cid9842127chemspider8017842unii1a635076cecomptox dashboard (epa)dtxsid80147422 echa infocard100.031.078 chemical and physical dataformulac25h34o2molar mass366.545 g·mol−13d model (jsmol)interactive image smiles o(\c4=c\c3=c\c2(cc1(c)(c#c)(o)cc12)3cc4)c5cccc5 inchi inchi=1s/c25h34o2/c1-3-25(26)15-13-23-22-10-8-17-16-19(27-18-6-4-5-7-18)9-11-20(17)21(22)12-14-24(23,25)2/h1,8,16,18,20-23,26h,4-7,9-15h2,2h3/t20-,21+,22+,23-,24-,25-/m0/s1key:pcjfrmoezqqsax-aioszgmzsa-n