119-17-5 123633-48-7 Benzenesulfonic acid, 3-(4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)- Benzenesulfonic acid, m-(3-methyl-5-oxo-2-pyrazolin-1-yl)- (8CI) EINECS 204-303-0 NSC 15354 m-(4,5-Dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)benzenesulphonic acid