1,4-Dinitroso-2-methylpiperazine 2-Methyl-dnpz 2-Methyldinitrosopiperazine 5-23-03-00287 (Beilstein Handbook Reference) 55556-94-0 BRN 0148556 Dinitroso-2-methylpiperazine PIPERAZINE, 1,4-DINITROSO-2-METHYL-