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Bioactivity-guided fractionation methods were used to identify and purify active components in Tinta Cão grape pomace extract (GPE) that inhibit intestinal α-glucosidases. One active α-glucosidase inhibitor and one new natural product determined as 6-O-(p-coumaroyl)-D-glucopyranoside and methyl 6-O-(p-coumaroyl)-β-D-galactopyranoside, respectively, were isolated from GPE that were previously shown...
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