62669-66-3 75037-22-8 9-(2-Carboxyphenyl)-3,6-bis(ethylamino)-2,7-dimethylxanthylium perchlorate EINECS 263-686-2 Xanthylium, 9-(2-carboxyphenyl)-3,6-bis(ethylamino)-2,7-dimethyl-, perchlorate