Einecs 285-793-3

7-(4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)-4-hydroxynaphthalene-2-sulphonic acid

7-[(4,5-Dihydro-3-methyl-5-oxo-1H-pyrazol)-1-yl]-4-hydroxy-2-naphthalenesulfonic acid