英文别名Cy 5; Cy5 DiSE(Di SO3); Sulfo-Cy5 diacid, SE; 1-[6-[(2,5-Dioxo-1-pyrrolidinyl)oxy]-6-oxohexyl]-2-[5-[1-[6-[(2,5-dioxo-1-pyrrolidinyl)oxy]-6-oxohexyl]-1,3-dihydro-3,3-dimethyl-5-sulfo-2H-indol-2-ylidene]-1,3-pentadien-1-yl]-3,3-dimethyl-5-sulfo-3H-indolium inner salt; 1-{6-[(2,5-Dioxo-1-pyrrolidinyl)oxy]-6-oxohexyl}-2-[(1E,3E,5E)-5-(1-{6-[(2,5-dioxo-1-pyrrolidinyl)oxy]-6-oxohexyl}-3,3-dimethyl-5-sulfo-1,3-dihydro-2H-indol-2-ylidene)-1,3-pentadien-1-yl]-3,3-dimethyl-3H-indolium-5-sulfonate 
