Synonyms: Benzoxazolium, 3-(2-carboxyethyl)-2-(3-(3-(2-carboxyethyl)-2(3H)-benzoxazolylidene)-1-propen-1-yl)-, inner salt;Anhydro-3,3'-bis(beta-carboxyethyl)-2,2'-oxacarbocyanine hydroxide;Benzoxazolium, 3-(2-carboxyethyl)-2-(3-(3-(2-carboxyethyl)-2(3H)-benzoxazolylidene)-1-propenyl)-, inner salt;Hydrogen 3-(2-carboxylatoethyl)-2-(3-(3-(2-carboxylatoethyl)-3H-benzoxazol-2-ylidene)prop-1-enyl)benzoxazolium;3,3'-[(1E)-prop-1-ene-1,3-diyldi-1,3-benzoxazol-3-ium-2,3-diyl]dipropanoate