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AMINO J PYRAZOLONE 6-(4,5-dihydro-3-methyl-5-oxo-1h-pyrazol-1-yl)-3-naphthalenedisulfonicacid 6-(4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)-1,3-naphthalenedisulfonic acid 6-(4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)naphthalene-1,3-disulphonic acid 6-(3-methyl-5-oxo-4,5-dihydropyrazol-1-yl)naphthalene-1,3-disulfonic acid AMINO-J-PYRAZOLE 6-(4,5-Dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)naphthalene-1,3-disulfonic acid 1-(5,7-Disulfo-2-naphtyl)-3-methyl-5(4H)-pyrazolone 7-(3-Methyl-5-oxo-2-pyrazolin-1-yl)-2,4-naphthalenedisulfonic acid