Citrus Sinensis extract Quercetin Hypericum
ascyron L Extract
Quercetin
Other Name: Meletin, Sophretin
Chem. Name: 4H-1-Benzopyran-4-one,
2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy-
M.F. &
M.W.: C15H10O7, 302.23
Physical Property: yellow
needle like crystal (dihydrate in dilute ethanol); dehydrate at 95-97 ;
M.P.: 314 (dissociate); solubility: 1g in 290ml anhydrous ethanol, or
23ml of glacial acetic acid; yellow alkaline solution; almost insoluble
in water; very bitter taste in ethanol; UV (EtOH, max) nm(log ):
258(2.75), 375(2.75) CNMR(DMSO-d6) : 146.9(C2), 135.8(C3), 175.9(C4),
156.2(C5), 98.3(C6), 164.0(C7), 93.5(C8), 160.8(C9), 103.1(C10),
122.1(C1'), 115.2(C2'), 145.1(C3'), 147.7(C4'), 115.7(C5'), 120.1(C6')
Plant Source: Quercus iberica, skin and leaves ;
Dysosma veitehii(Hemsl.et Vils.) Fu; Hypericum ascyron L., full plant;
Apocynum lancifolium Rus., leaves.
Functions and
applications: fairly good expectorant and antitussive; some
antiasthmatic effect; lowering of blood pressure, reducing the
brittalness of capillary vessel, lowering blood lipid, dilation of
coronary artery, increasing the flow in coronary artery. For the
treatment of chronical bronchitis, accessory treatment of coronary heart
diseases and hypertension [. Toxicity: oral dose, mice: LD50 at
160mg/kg.
