英文别名
                        4-[2-[3-[1,3-Bis(3-carboxypropyl)-5,6-dichlorobenzimidazol-3-ium-2-yl]prop-2-enylidene]-3-(3-carboxypropyl)-5,6-dichlorobenzimidazol-1-yl]butanoate;4-[2-[3-[1,3-bis(3-carboxypropyl)-5,6-dichlorobenzimidazol-3-ium-2-yl]prop-2-enylidene]-3-(3-carboxypropyl)-5,6-dichlorobenzimidazol-1-yl]butanoate