1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-1-(3-nitrophenyl)-5-oxo- 2-Pyrazoline-3-carboxylic acid, 1-(m-nitrophenyl)-5-oxo- (8CI) 4,5-Dihydro-1-(3-nitrophenyl)-5-oxo-1H-pyrazole-3-carboxylic acid 89-27-0 EINECS 201-893-1 NSC 9585