5 or 1'-Hydroxy-2-alkyl-7,8-cyclopentano[h]-1,2,3,4-tetrahydrois

5' Acetoxy vinblastine 4' bis-sulfite

5'-(8'-Hydroxyquinolyl)guanidine compounds

5'-Acetonylvincristine and related compounds

5'-Hydroxyleurosine and related compounds

5(3-Substituted aminopropyl)-10-trifluoromethoxy-5H-dibenz[b,f]a

5(6)-Benzene ring substituted benzimidazole-2-carbamate derivati

5(6)-Benzene ring substituted benzimidazole-2-carbamate derivati

5(6)-Benzene ring substituted benzimidazole-2-carbamate derivati

5(6)-Benzene ring substituted benzimidazole-2-carbamate derivati

5(OR 6)-[(Substituted-amino)alkyl]-2,3-naphthalenediols

5,12-Epoxy-naphthacene-6,11-dione derivatives

5,6,6A,6B,7,8-Hexahydrobenz[a]phenanthridine hydrochloride

5,6,7,8 Tetrahydroquinoline derivatives

5,6,7,8-tetrafluoroanthraquinone derivatives

5,6-Benzo analogues of prostaglandin E

5,6-Benzoisoindolines

5,6-Dehydropenicillins

5,6-DIARYL-1,2,4-TRIAZINES

5,6-Didehydro-.omega.-phenoxy-PGE.sub.2 analogs