1-Piperazineacetic acid, 4-methyl-, hydrazide 24632-44-8 4-Methyl-1-piperazineacetic acid hydrazide 4-Methylpiperazine-1-acetohydrazide BRN 0879926 EINECS 246-375-6 N-Methyl-N'-piperazinoacetohydrazide