英文别名1H-Pyrazole-5-carboxamide, 1,3-dimethyl-4-nitro-; Sildenafil Impurity 112; 2,5-dimethyl-4-nitropyrazole-3-carboxamide; 1,3-dimethyl-4-nitropyrazole-5-carboxamide; 1,3-dimethyl-4-nitropyrazol-5-carboxamide; 1,3-Dimethyl-4-nitro-5-pyrazolecarboxamide 
