The molecule is a fluorescent dye with a maximum emission wavelength of 572 nm, derived from a heteroheptacyclic ring system. It has a role as a fluorochrome. It is an iminium betaine, an organic heteroheptacyclic compound and a cyanine dye.
24-[2-(2,5-dioxopyrrolidin-1-yl)oxy-2-oxoethyl]-5,5,27,27-tetramethyl-16-oxa-20-aza-12-azoniaheptacyclo[15.11.0.03,15.04,12.06,11.020,28.021,26]octacosa-1(28),2,4(12),6(11),7,9,21(26),22,24-nonaene-8-sulfonate