Two new ferulic acid esters of oligo-glucose, 1-Ο-(E)-feruloyl-β--D-gentiobioside (1) and 1-Ο-(E)feruloyl-{β-D-glucopyranosy (1->6)-[β-D-glucopyranosyl (I--2)]}-β-D-glucopyranoside.(allimacronoid D, 2) were isolated together with 1-Ο-(E)-feruloyl-β-D-glucopyranoside (3) and trans-ferulic acid (4)
The extract of garlic skins (peels) showed strong antioxidant activity, and some responsible constituents were isolated and identified. Garlic (Allium sativum L.) has been used as an herbal medicine, but there is no report on the health benefits of the skin or peel. In this study, the