(Methoxycarbonyl)hydrazine 6294-89-9 AI3-62053 Carbazic acid, methyl ester (8CI) Carbomethoxyhydrazide EINECS 228-560-3 Hydrazinecarboxylic acid, methyl ester Methyl carbazate Methyl hydrazinecarboxylate Methyl hydrazinocarboxylate Methyl hydrazinoformate Methylcarbazate NSC 11709