3(2H)-Benzoxazolepropanesulfonic acid, 2-[4-(1,3-dibutyltetrahydro-4,6-dioxo-2-thioxo-5(2H)-pyrimidinylidene)-2-butenylidene]- 5-[(3-Sulfopropyl-2(3H)-benzoxazolylidene)-2-butenylidene]-1,3-dibutyl-2-thio-barbituric acid 62796-23-0 (SODIUM SALT) AIDS-000804 AIDS000804 GEVA-NCDDG MC 540 Merocyanine 540 P-MC-540