Benzenesulfonamide,3-[4,5-dihydro-4-[(2-hydroxy-5-methyl-3-nitrophenyl)azo]-3-methyl-5-oxo-1H-pyrazol-1-yl]-(9CI); Benzenesulfonamide,m-[4-(6-hydroxy-5-nitro-m-tolylazo)-3-methyl-5-oxo-2-pyrazolin-1-yl]- (6CI)
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