• Journal of the Korea Convergence Society
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• v.9 no.6
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• pp.89-98
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• 2018

To confirm the feasibility as raw materials for cosmetic formulation, ethanol, n-hexane, ethylacetate and normal butyl alcohol were extracted from 1kg of Ginko leaves. Ultimately, investigated chemical structure and physicochemical properties of ginkgetin and isoginkgetin. The purity of those two components have been evaluated higher than 99%. They are isomers with molecular weight as 566 and a molecular formular, $C_{32}H_{22}O_{10}$. Flavonoid's frame and NMR spectrum exhibited the existence of aromatic proton and the proper ratio of the carbon, which were expected structures exactly corresponded to the reported references.