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