2-(4-Carboxymethylphenyl)-4-phenyl-5-methyl-2,4-dihydropyrazol-3-one 90614-63-4 Benzeneacetic acid, 4-(4,5-dihydro-3-methyl-5-oxo-4-phenyl-1H-pyrazol-1-yl)-, (R*,R*)-(-)- MG 18949 MG-18949