N'-(2,3-dihydro-1H-benzotriazol-5-yl)-N-[4-(2-formylhydrazinyl)phenyl]butanediamide;2-(2,4-dimethylphenoxy)-N-[4-(2-formylhydrazinyl)phenyl]butanamide;2-(2,4-dimethylphenoxy)-N-[3-[[4-(2-formylhydrazinyl)phenyl]sulfamoyl]phenyl]butanamide;N-[3-[[4-(2-formylhydrazinyl)phenyl]sulfamoyl]phenyl]-3-(5-sulfanylidene-2H-tetrazol-1-yl)benzamide;N-[2-(2-sulfanylidene-3H-1,3-benzothiazole-6-carbonyl)hydrazinyl]formamide