IUPAC:9-(2-carboxylato-4-{[(2,5-dioxopyrrolidin-1-yl)oxy]carbonyl}phenyl)-3,6-bis(dimethylamino)-10lambda4-xanthen-10-ylium; 9-(2-carboxylato-5-{[(2,5-dioxopyrrolidin-1-yl)oxy]carbonyl}phenyl)-3,6-bis(dimethylamino)-10lambda4-xanthen-10-ylium
IUPAC:9-(2-carboxylato-4-{[(2,5-dioxopyrrolidin-1-yl)oxy]carbonyl}phenyl)-3,6-bis(dimethylamino)-10lambda4-xanthen-10-ylium; 9-(2-carboxylato-5-{[(2,5-dioxopyrrolidin-1-yl)oxy]carbonyl}phenyl)-3,6-bis(dimethylamino)-10lambda4-xanthen-10-ylium