1-Piperazineacetic acid, 4-methyl-, (5-nitrofurfurylidene)hydrazide, maleate (2:1) 24632-47-1 4-Methyl-1-piperazineacetic acid, (5-nitrofurfurylidene)hydrazide maleate (2:1) 51799-31-6 Nifurpipone maleate (2:1)