113906-00-6 Benzyl 2-((1-methylpyrrol-2-yl)methylene)hydrazinecarboxylate Carbazic acid, 2-((1-methylpyrrol-2-yl)methylene)-, benzyl ester Hydrazinecarboxylic acid, ((1-methyl-1H-pyrrol-2-yl)methylene)-, phenylmethyl ester