Patent ID: 6191278
Filing Date: 2001-02-20
Classification: C07D,C07H,C09B,G01N

Abstract:
A rhodamine dye or a salt thereof, comprising a rhodamine-type parent xanthene ring having attached to the xanthene C9 carbon a phenyl group that is further substituted with an ortho carboxy or ortho sulfonate group or a salt thereof, one to three substituted or unsubstituted aminopyridinium groups and a substituted or unsubstituted alkylthio, or arylthio group, said rhodamine dye optionally including one or more linking moieties selected from the group consisting of an azido, a monosubstituted primary amine, a disubstituted secondary amine, a thiol, an hydroxyl, a halide, an epoxide, an N-hydroxysuccinimidyl ester, a carboxyl, and an activated ester.