68133-97-1 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 EINECS 268-719-4 Hydrogen 3-(2-carboxylatoethyl)-2-(3-(3-(2-carboxylatoethyl)-3H-benzoxazol-2-ylidene)prop-1-enyl)benzoxazolium