algestone acetonide algestone acetonide algestone acetonide (developmental code name w-3395), also known as algestone 16α,17α-acetonide or 16α,17α-isopropylidenedioxyprogesterone, is a progestin which was never marketed. it is the acetonide cyclic ketal of algestone. another progestin, algestone acetophenide, in contrast, has been marketed. not to be confused with algestone acetophenide. algestone acetonideclinical dataother namesw-3395; alfasone acetonide; alphasone acetonide; algestone 16α,17α-acetonide; 16α,17α-isopropylidenedioxyprogesterone; 16α,17α-(isopropylidenedioxy)pregn-4-ene-3,20-dionedrug classprogestin; progestogenidentifiers iupac name (1r,2s,4r,8s,9s,12s,13r)-8-acetyl-6,6,9,13-tetramethyl-5,7-dioxapentacycloicos-17-en-16-one cas number4968-09-6pubchem cid11740874chemspider9915579uniiwxd8i4y1ihkeggd02808chebichebi:49320chemblchembl2105960comptox dashboard (epa)dtxsid80964338 echa infocard100.023.280 chemical and physical dataformulac24h34o4molar mass386.532 g·mol−13d model (jsmol)interactive image smiles cc(=o)12(c31(cc43ccc5=cc(=o)cc45c)c)oc(o2)(c)c inchi inchi=1s/c24h34o4/c1-14(25)24-20(27-21(2,3)28-24)13-19-17-7-6-15-12-16(26)8-10-22(15,4)18(17)9-11-23(19,24)5/h12,17-20h,6-11,13h2,1-5h3/t17-,18+,19+,20-,22+,23+,24-/m1/s1key:lswbqiazngurqv-wtbiuskosa-n chemistry