3-(2-Carboxyethyl)phenylboronic acid → 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

Participants

Role	Name	HCID	Charge
Reactant	3-(2-Carboxyethyl)phenylboronic acid	HCID 3856118	—
Reactant	Sodium 2-((1E,3Z,5E)-3-(3-(4-Carboxybutyl)phenyl)-5-(1,1-dimethyl-6,8-disulfonato-3-(3-sulfonatopropyl)-1H-benzo[e]indol-2(3H)-ylidene)penta-1,3-dienyl)-1,1-dimethyl-3-(3-sulfonatopropyl)-1H-benzo[e]indolium-6,8-disulfonate	HCID 86649207	—
Product	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	—

Compound 10 was prepared analogously to compound 8 (Example 8), except that 3-(3-boronophenyl)propionic acid is used as a starting material.