| Synonyms |
p-(4,5-Dihydro-4-((2-hydroxy-5-methyl-3-nitrophenyl)azo)-3-methyl-5-oxo-1H-pyrazol-1-yl)benzenesulphonic acid; 4-{3-methyl-4-[(2E)-2-(3-methyl-5-nitro-6-oxocyclohexa-2,4-dien-1-ylidene)hydrazinyl]-5-oxo-4,5-dihydro-1H-pyrazol-1-yl}benzenesulfonic acid |