2-Pyrazolin-5-one, 3-methyl-4-nitro-1-(p-nitrophenyl)- 3-Methyl-4-nitro-1-(p-nitrophenyl)-2-pyrazolin-5-one 3-Methyl-4-nitro-1-p-nitrophenyl-5-pyrazolone 3H-Pyrazol-3-one, 2,4-dihydro-5-methyl-4-nitro-2-(4-nitrophenyl)- 46972-75-2 550-74-3 BRN 0623723 EINECS 208-986-6 NSC 5049 Picrolonic acid Picrolonic acid (VAN) (8CI)