xanthene dyes 

https://doi.org/10.1351/goldbook.X06695
Dyes derived by condensation of phthalic anhydride with resorcinol (and derivatives) or m-aminophenol (and derivatives), of which fluorescein is the prototype (all such dyes have the xanthene nucleus).
See also: phthaleins, rhodamine dyes
Source:
PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1374 [Terms] [Paper]
Citation: 'xanthene dyes' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.X06695 RIS BibTex EndNote
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Last revised: February 24, 2014