Derivative Type: Dihydrate
Properties: Pale yellow needles from dil alcohol, mp 318°. uv max (alc): 259, 361 nm (log e 4.23, 4.34). Sol in hot alcohol; sparingly sol in boiling water.
Melting point: mp 318°
Absorption maximum: uv max (alc): 259, 361 nm (log e 4.23, 4.34)
Derivative Type: Hexaacetate
Percent Composition: C 56.85%, H 3.89%, O 39.27%
Properties: Needles from alcohol + acetic acid, mp 209-211°. Sparingly sol in alc.
Melting point: mp 209-211°
Derivative Type: 7-Glucoside
Additional Names: Quercetagitrin
Percent Composition: C 52.51%, H 4.20%, O 43.30%
Literature References: From flowers of the African marigold, Tagetes erecta L., Compositae: Rao, Seshadri, Proc. Indian Acad. Sci.
14A, 289 (1941), C.A.
36, 25553 (1942); from Chrysanthemum coronarium L., Compositae: Anyas, Steelink, Arch. Biochem. Biophys.
90, 63 (1960). Structure: Rajagopalan, Seshadri, Proc. Indian Acad. Sci.
28A, 31 (1948), C.A.
43, 4265b (1949).
Properties: Crystals from aqueous pyridine, dec 236-238°. uv max (95% ethanol): 260, 272, 362 nm.
Absorption maximum: uv max (95% ethanol): 260, 272, 362 nm
产品链接: 90-18-6››