1-Phenol-4-sulfonamide,2-(3-methyl-5-oxo-1-phenyl-2-pyrazolin-4-ylazo)-6-nitro- (6CI);Benzenesulfonamide,3-[(4,5-dihydro-3-methyl-5-oxo-1-phenyl-1H-pyrazol-4-yl)azo]-4-hydroxy-5-nitro-(9CI); Orasol Red 2BL
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