Studies on the Flavonoids in Tea Leaves |
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| Authors: | Yoshinori Takino Hiroshi Imagawa Hiroyuki Yoshida |
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| Institution: | 1. Department of Agricultural Chemistry, Faculty of Agriculture, Tokyo University of Education, Tokyo;2. Saitama Prefectural Tea Experimental Station, Saitama |
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| Abstract: | Yellow needle crystals, C21H20O13?H2O have been isolated from tea leaves. The crystals yield myricetin (hexaacetate, m.p. 211~212°C), glucose and galactose on hydrolysis. As analytical data indicate the molecular ratio of myricetin to the sugars to be 1:1 and the only bonding position of the sugars to be position 3 of the aglycone, the crystals are concluded to consist of two kinds of glycosides, namely myricetin-3-glucoside and myricetin-3-galactoside. |
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