Fluorone

Fluorone is a heterocyclic chemical compound. It forms the core structure for various chemicals, most notably fluorone dyes,[1] including fluorescein, erythrosine and rhodamine. It is an isomer of xanthone, sometimes referred to as an isoxanthone.

Chemical structure of erythrosine

Not to be confused with fluorene, fluorenone, or fluorine.

Fluorone

Names
IUPAC name Xanthen-3-one
Other names 3-Isoxanthone; 3-Oxo-3H-xanthene
Identifiers
CAS Number	494-41-7^Y
3D model (JSmol)	Interactive image
ChemSpider	9507995^Y
PubChem CID	11333049
CompTox Dashboard (EPA)	DTXSID60462625
InChI InChI=1S/C13H8O2/c14-11-6-5-10-7-9-3-1-2-4-12(9)15-13(10)8-11/h1-8H^Y Key: FRIPRWYKBIOZJU-UHFFFAOYSA-N^Y InChI=1/C13H8O2/c14-11-6-5-10-7-9-3-1-2-4-12(9)15-13(10)8-11/h1-8H Key: FRIPRWYKBIOZJU-UHFFFAOYAE
SMILES O=C/2/C=C\C1=C\c3c(O/C1=C\2)cccc3
Properties
Chemical formula	C13H8O2
Molar mass	196.205 g·mol^−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y verify (what is ^YN ?)
Infobox references

References

1. Shi, Jianmin; Zhang, Xianping; Neckers, Douglas C (1992). "Xanthenes: fluorone derivatives". Journal of Organic Chemistry. 57 (16): 4418–4421. doi:10.1021/jo00042a020.