英文别名1H-Pyrazole-3-carboxylic acid, 1-methyl-4-nitro-5-propyl-; 1-methyl-4-nitro-5-propylpyrazole-3-carboxylic acid; 1-methyl-4-nitro-5-propyl-3-pyrazolecarboxylic acid; 2-Methyl-4-nitro-3-n-propylpyrazole-5-carboxylic Acid; Sildenafil Impurity 104; Sildenafil Impurity 177 
