8,12-Dialkyl-PGE, and PGF.sub.1.sub..alpha.

8,12-Diisoprostanoic acid derivatives

8,8-Disubstituted-6-methylergolines and related compounds

8-(.beta.-AMINOETHYL)ERGOLINES-I

8-(5-Formyl-2-furyl)-octanoic acid

8-Alkyl-5-oxo-5,8-dihydro-pyrido(2,3-d)pyrimidine-6-carboxylic a

8-Amino-5,6,7,8-tetrahydroquinoline derivatives

8-Aralkyl-1,4-ethano-5H-[1]benzopyrano[3,4-b]pyridines

8-Aryl-9-ergolenes

8-Aza-9-dioxothiaprostanoic acids

8-Aza-9-oxo(and dioxo)-thia-11,12-secoprostaglandins

8-Benzimido substituted quinaphthalone derivatives

8-Carboxamide dibenzobicyclo(3.2.1)octadienes

8-Carboxyl-tetrahydroquinoline derivatives

8-Carboxylester, and 8-carbamyl derivitives of 5,6,7,8-tetrahydr

8-Cyano-5,6,7,8-tetrahydroquinoline derivatives

8-Exo-hydroxy-endo-tricyclo [5.2.2.0.sup.2,6 ]undecane

8-Halo-11,12-secoprostaglandins

8-Halo-11,12-secoprostaglandins

8-Halo-dibenzofuran-3-acetic acids and certain esters thereof