63217-34-5 Benzenesulfonic acid, 3-methyl-4-(3-heptadecyl-4,5-dihydro-5-oxo-1H-pyrazol-1-yl)- Benzenesulfonic acid, 4-(3-heptadecyl-4,5-dihydro-5-oxo-1H-pyrazol-1-yl)-3-methyl-