Properties: Yellow leaflets from methanol, does not melt below 300°. uv max (ethanol): 286, 339 nm (e 16600; 18300).
Absorption maximum: uv max (ethanol): 286, 339 nm (e 16600; 18300)
Derivative Type: Tetraacetate
Percent Composition: C 60.80%, H 3.99%, O 35.21%
Properties: Prisms from ethyl acetate, mp 235-237°.
Melting point: mp 235-237°
Derivative Type: Glucuronide
Additional Names: Scutellarin
Percent Composition: C 54.55%, H 3.92%, O 41.52%
Literature References: From leaves of Scutellaria altissima Linn., Labiatae: Goldschmiedt, Zerner, Monatsh. Chem.
31, 439 (1910); from Centaurea scabiosa L., Compositae: Charaux, Rabaté, J. Pharm. Chim.
9, 155 (1940); from Scutellaria spp.: Marsh, Biochem. J.
59, 58 (1955); Nature
183, 1824 (1959). Synthesis: Farkas et al., Ber.
107, 3878 (1974).
Properties: Needles from alc, darkens above 230°, does not melt below 300°. [a]D18 -14° (water); [a]D20 -139° (pyridine). uv max (ethanol): 285, 335 nm (e 20000; 26100). Practically insol in water. Sol in alkali hydroxides, glacial acetic acid; slightly sol in organic solvents.
Optical Rotation: [a]D18 -14° (water); [a]D20 -139° (pyridine)
Absorption maximum: uv max (ethanol): 285, 335 nm (e 20000; 26100)
产品链接: 529-53-3››