CAS No 524-30-1 , 7-hydroxy-6-methoxy-8-[(2S,3R,4S,5S,6R)-3,4,
5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxychromen-2-one

Title: Fraxin
CAS Registry Number: 524-30-1
CAS Name: 8-(b-D-Glucopyranosyloxy)-7-hydroxy-6-methoxy-2H-1-benzopyran-2-one
Synonyms: 7,8-dihydroxy-6-methoxycoumarin-8-b-D-glucoside; 8-(glucosyloxy)-6-methoxyumbelliferone; fraxetin-8-glucoside; fraxoside; paviin
Molecular Formula: C16H18O10
Molecular Weight: 370.31
Percent Composition: C 51.89%, H 4.90%, O 43.21%
Literature References: From bark of the common European ash (Fraxinus excelsior L.): Salm-Horstmar, Pogg. Ann. 100, 607 (1857); from F. oxyphylla Mar., Oleaceae: Paris, Stambouli, Compt. Rend. 253, 313 (1961). Identity with paviin: Stokes, J. Chem. Soc. 12, 126 (1859). From the horse chestnut tree (Aesculus hippocastanum L., Hippocastanaceae): Reppel, Planta Med. 4, 199 (1956); from Diervilla spp., Caprifoliaceae: Charaux, J. Pharm. Chim. [7] 4, 248 (1911). Structure: Wessely, Demmer, Ber. 62, 120 (1929).
Properties: Yellow hydrated needles from water or dil alc. Slightly bitter, astringent taste. The water of crystn (about 3 mols) is removed at 130° and 0.2 mm Hg. The anhydr substance, mp 205° (rapid heating). Sparingly sol in cold water; freely sol in hot water, hot alcohol. Practically insol in ether. Alkaline solns are sulfur-yellow and on dilution show characteristic blue-green fluorescence.
Melting point: mp 205° (rapid heating)