1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-5-oxo-1-phenyl-
2-Pyrazoline-3-carboxylic acid, 5-oxo-1-phenyl-
4,5-Dihydro-5-oxo-1-phenyl-1H-pyrazole-3-carboxylic acid
1-Phenyl-5-pyrazolone-3-carboxylic acid
1-Phenyl-3-carboxy-5-pyrazolone
3-Carboxy-1-phenyl-5-pyrazolone
3-Carboxy-1-phenyl-2-pyrazolin-5-one
5-Oxo-1-phenyl-4,5-dihydro-1H-pyrazole-3-carboxylic acid