Sodium (E)-2-((2Z,4E)-3-(3-(4-Carboxybutyl)phenyl)-5-(5-chloro-3,3-dimethyl-7-(3-sulfonatopropyl)-3H-pyrrolo[2,3-b]pyridin-7-ium-2-yl)penta-2,4-dienylidene)-3,3-dimethyl-1-(3-sulfonatopropyl)indoline-5-sulfonate → Sodium (E)-2-((2Z,4E)-5-(5-Chloro-3,3-dimethyl-7-(3-sulfonatopropyl)-3H-pyrrolo[2,3-b]pyridin-7-ium-2-yl)-3-(3-(5-(2,5-dioxopyrrolidin-1-yloxy)-5-oxopentyl)phenyl)penta-2,4-dienylidene)-3,3-dimethyl-1-(3-sulfonatopropyl)indoline-5-sulfonate

Participants

Role	Name	HCID	Charge
Reactant	Sodium (E)-2-((2Z,4E)-3-(3-(4-Carboxybutyl)phenyl)-5-(5-chloro-3,3-dimethyl-7-(3-sulfonatopropyl)-3H-pyrrolo[2,3-b]pyridin-7-ium-2-yl)penta-2,4-dienylidene)-3,3-dimethyl-1-(3-sulfonatopropyl)indoline-5-sulfonate	HCID 131736610	—
Reactant	HCID 178422047	HCID 178422047	—
Product	Sodium (E)-2-((2Z,4E)-5-(5-Chloro-3,3-dimethyl-7-(3-sulfonatopropyl)-3H-pyrrolo[2,3-b]pyridin-7-ium-2-yl)-3-(3-(5-(2,5-dioxopyrrolidin-1-yloxy)-5-oxopentyl)phenyl)penta-2,4-dienylidene)-3,3-dimethyl-1-(3-sulfonatopropyl)indoline-5-sulfonate	HCID 57329957	—

Compound 33 is prepared analogously to compound 29 (Example 38), except that compound 32 is used as a starting material.