Sodium 2-((1E,3Z,5E)-5-(1,1-Dimethyl-6,8-disulfonato-3-(3-sulfonatopropyl)-1H-benzo[e]indol-2(3H)-ylidene)-3-(3-(5-(2,5-dioxopyrrolidin-1-yloxy)-5-oxopentyl)phenyl)penta-1,3-dienyl)-1,1-dimethyl-3-(3-sulfonatopropyl)-1H-benzo[e]indolium-6,8-disulfonate → Sodium 2-((1E,3Z,5E)-5-(1,1-Dimethyl-6,8-disulfonato-3-(4-sulfonatobutyl)-1H-benzo[e]indol-2(3H)-ylidene)-3-(3-(3-(2,5-dioxopyrrolidin-1-yloxy)-3-oxopropyl)phenyl)penta-1,3-dienyl)-1,1-dimethyl-3-(4-sulfonatobutyl)-1H-benzo[e]indolium-6,8-disulfonate

Participants

Role	Name	HCID	Charge
Reactant	Sodium 2-((1E,3Z,5E)-5-(1,1-Dimethyl-6,8-disulfonato-3-(3-sulfonatopropyl)-1H-benzo[e]indol-2(3H)-ylidene)-3-(3-(5-(2,5-dioxopyrrolidin-1-yloxy)-5-oxopentyl)phenyl)penta-1,3-dienyl)-1,1-dimethyl-3-(3-sulfonatopropyl)-1H-benzo[e]indolium-6,8-disulfonate	HCID 49782912	—
Reactant	Sodium 2-((1E,3Z,5E)-3-(3-(2-Carboxyethyl)phenyl)-5-(1,1-dimethyl-6,8-disulfonato-3-(4-sulfonatobutyl)-1H-benzo[e]indol-2(3H)-ylidene)penta-1,3-dienyl)-1,1-dimethyl-3-(4-sulfonatobutyl)-1H-benzo[e]indolium-6,8-disulfonate	HCID 86649209	—
Product	Sodium 2-((1E,3Z,5E)-5-(1,1-Dimethyl-6,8-disulfonato-3-(4-sulfonatobutyl)-1H-benzo[e]indol-2(3H)-ylidene)-3-(3-(3-(2,5-dioxopyrrolidin-1-yloxy)-3-oxopropyl)phenyl)penta-1,3-dienyl)-1,1-dimethyl-3-(4-sulfonatobutyl)-1H-benzo[e]indolium-6,8-disulfonate	HCID 86649211	—

Compound 11 was prepared analogously to compound 9 (Example 9), except that compound 10 was used as a starting material.