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

19-Hydroxy-19-methyl-4-oxo-PGI compounds

19-Hydroxy-19-methyl-5-hydroxy-PGI compounds

19-Hydroxy-19-methyl-6,7-didehydro-PGI.sub.1 compounds

19-Hydroxy-19-methyl-6,9.alpha.-epoxymethano-PGF compounds

19-Hydroxy-19-methyl-6-alkoxy-PGI.sub.1 compounds

19-Hydroxy-19-methyl-6-hydroxy-7a-homo-PGI.sub.1 compounds