63549-13-3 Xanthylium, 9-(2-carboxyphenyl)-2,7-dichloro-3,9a-dihydro-6-hydroxy-3-oxo-, MeSO3H Xanthylium, 9-(2-carboxyphenyl)-2,7-dichloro-3,9a-dihydro-6-hydroxy-3-oxo-, methanesulfonate Xanthylium, 9-(2-carboxyphenyl)-2,7-dichloro-3,9a-dihydro-6-hydroxy-3-oxo-, methanesulfonate (salt)