17-Alkylthio (and arylthio) androsteno[17.alpha.,16.alpha.-b]ben

17-Alkylthio (and arylthio)-1',2',3',4'-tetrahydroandrosteno [16

17-Hydroxy-steroids

17-Nor-6-methyl-steroids

17-Phenyl-18,19,20-trinor-cis-4,5-didehydro-PGF.sub.1.sub..alpha

17-Substituted sulfonyl-16,16-disubstituted androstenes

17-Substituted thia-17-alkyl(or alkenyl or alkynyl)androstenes

17-[(Hydroxymethyl)formamido-methylene]-steroids

17.alpha.-Acyloxy-5.beta.-corticoids

17.alpha.-Acyloxy-5.beta.-corticoids and 17.alpha.-acyloxy-5.alp

17.beta.(Substituted thio)-16-ketoandrostene-17.alpha...-carboxy

17.beta.-(substituted thio)androstenes

17.beta.-Difluoromethyl steroids

17.beta.-Ethynyl-3,17.alpha.-estradiol and derivatives thereof

17.beta.-ethynylsteroids and process for preparing same

17.beta.-SUBSTITUTED-ALLENE-BEARING STEROIDS

18- AND 19-Hydroxylated prostaglandins

19,8-Lactone steroid derivatives and processes of preparation th

19-Hydroxy PGE.sub.1 carbinol analogues

19-Hydroxy-19-methyl-4,5-didehydro-PGI.sub.1 compounds