Quingestanol

Quingestanol
Clinical data

ATC code	G03AC04 (WHO) G03AA02 (WHO) (with an estrogen)
Identifiers
IUPAC name (17β)-3-(cyclopentyloxy)-17-ethynylestra-3,5-dien-17-ol
CAS Number	10592-65-1
PubChem CID	9842127
ChemSpider	8017842
UNII	1A635076CE
ECHA InfoCard	100.031.078
Chemical and physical data
Formula	C₂₅H₃₄O₂
Molar mass	366.536 g/mol
3D model (Jmol)	Interactive image
SMILES O(\C4=C\C3=C\C[C@@H]2[C@H](CC[C@]1(C)[C@@](C#C)(O)CC[C@H]12)[C@H]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/s1 Key:PCJFRMOEZQQSAX-AIOSZGMZSA-N

Quingestanol (INN, BAN), also known as norethisterone 3-cyclopentyl enol ether, is a steroidal 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.