The molecule is a carboxylic ester that is the ethyl ester of fluorescein in its ring-opened acid form and substituted on one of the oxygen functions of the xanthene nucleus by a carboxymethyl group. It has a role as a fluorescent probe. It is an ethyl ester and a dicarboxylic acid monoester. It derives from a fluorescein.
2-[9-(2-ethoxycarbonylphenyl)-6-oxoxanthen-3-yl]oxyacetic acid