2-Decarboxy-2-tetrazolyl-6-keto-PGE.sub.1 compounds

2-Decarboxy-2-tetrazolyl-9-deoxy-5,9.alpha.-epoxy-4,5-cis-17,18

2-Decarboxy-2-tetrazolyl-PG.sub.2 compounds

2-Decarboxy-2-tetrazolyl-PGI.sub.2 compounds

2-Decarboxy-2-tetrazolyl-trans-2,3,4,5-tetradehydro-PGI.sub.1 co

2-Descarboxy-2-(tetrazol-5-yl)-16,16-dimethyl-17-( 2-furyl)-.ome

2-Halomethyl-5-vinyl-1,3,4-oxadiazole compounds

2-Hetero-acetamido-cephalosporinates

2-Methyl-5-(2-hydroxystyryl)-1,3,4-thiadiazole

2-Substituted-5-trifluoromethyl-1,3,4-thiadiazoles

25-Hydroxycholecalciferol-26,23-lactone

2H-cyclopenta b!furan-2-ones and process for preparation

3-Amino-2-Hydrazinopyridine derivatives

3-Dicyanomethylidene-2,3-dihydrothiophen-1,1-dioxide derivatives

3-Nitropyrazole derivatives

3-Phenacyl and phenacylidene phthalimidines and corresponding na

3-Vinyl-cephalosporins

3-[[5-(4-Chlorophenyl)furfurylidene] amino]-5-(substituted)-2-ox

4 Halo-5,9-epoxy-9-deoxy-PGF.sub.1, amides

4-(V-triazolyl)-styryl optical brighteners