Isolation and identification of alpha-glucosidase inhibitors from tochu-cha (Eucommia ulmoides) - PubMed (original) (raw)
Isolation and identification of alpha-glucosidase inhibitors from tochu-cha (Eucommia ulmoides)
J Watanabe et al. Biosci Biotechnol Biochem. 1997 Jan.
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Abstract
alpha-Glucosidase inhibitory activity was found in aqueous methanol extracts of tochu-cha, dried leaves of Eucommia ulmoides (Eucommiaceae). Five active principles against yeast enzyme were isolated and characterized. Among them, quercetin (1, Ki: 8.5 x 10(-6) M) was considered to contribute mostly to the activity of the tochu leaves. In regard to an animal alpha-glucosidase, rat intestinal sucrase activity was also inhibited by 1.
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