Absorption and fluorescence emission spectra of 5-(and-6)-carboxynaphthofluorescein in pH 10.0 buffer.
C652: 5-(and-6)-carboxynaphthofluorescein *mixed isomers*
C653: 5-(and-6)-carboxynaphthofluorescein, succinimidyl ester *mixed isomers*
C13196: 5-(and-6)-carboxynaphthofluorescein diacetate