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3,5-Dinitrosalicylic acid Piperazine 1-(3-Nitorpyridin-2-yl)piperazine 2-(4-Methylpiperazin-1-yl)-5-nitropyridine Tert-butyl 4-(6-nitropyridin-3-yl)piperazine-1-carboxylate 1-(6-nitropyridin-3-yl)piperazine 3-METHYL-1-(5-NITROPYRIDIN-2-YL)PIPERAZINE 4-(6-METHYL-5-NITRO-2-PYRIDINYL)-1-PIPERAZINECARBOXYLIC ACID 1,1-DIMETHYLETHYL ESTER