3H-IndoliuM, 2-[5-[1-[6-[(6-azidohexyl)aMino]-6-oxohexyl]-1,3-dihydro-3,3-diMethyl-5-sulfo-2H-indol-2-ylidene]-1,3-pentadien-1-yl]-1-ethyl-3,3-diMethyl-
5-sulfo-, inner salt
3H-IndoliuM, 2-[5-[1-[6-[(6-azidohexyl)aMino]-6-oxohexyl]-1,3-dihydro-3,3-diMethyl-5-sulfo-2H-indol-2-ylidene]-1,3-pentadien-1-yl]-1-ethyl-3,3-diMethyl- 5-sulfo-, inner salt