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- structure: 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 more about our products, please visit us in our website: http://www.organic-herb.com if there are any further questions, please do not hesitate to contact me. we welcome your precious suggestions and any of your question. thanks for your interests in organic herb inc. sincerely yours, ms mary liu sales manager organic herb inc. phone +86 731 4060828 mobile +86 131 8709 3042 fax +86 731 4023669 email: mary@organic-herb.com website: http://www.organic-herb.com add: no.1038.shanshuirenjia3rd.kaiyuanroad, xinsha, changsha, hunan, china 410100