Alexa fluor 647 maleimide

3H-Indolium, 2-[5-[1,3-dihydro-3,3-dimethyl-5-sulfo-1- (3-sulfopropyl) -2H-indol-2-ylidene]-1,3-pentadien-1-yl]-3-[5-[[2- (2,5-dihydro-2,5-dioxo-1H-pyrrol-1-yl) ethyl]amino]-5-oxopentyl]-3-methyl-5-sulfo-1- (3-sulfopropyl) -, inner salt

O=C1C=CC (=O) N1CCNC (=O) CCCCC2 (C=3C=C (C=CC3[N+] (=C2C=CC=CC=C4N (C5=CC=C (C=C5C4 (C) C) S (=O) (=O) O) CCCS (=O) (=O) O) CCCS (=O) (=O) [O-]) S (=O) (=O) O) C