A New Neolignan Glycoside from the Leaves of Acer truncatum

摘要

A new neolignan glycoside, (7R,8R)-7,8-dihydro-9′-hydroxyl-3′-methoxyl- 8-hydroxymethyl-7-(4-hydroxy-3-methoxyphenyl)-1′-benzofuranpropanol 9′-O-β-D- glucopyranoside (>1) was isolated from the leaves of Acer truncatum along with (7R,8R)-7,8-dihydro-9′-hydroxyl-3′-methoxyl-8-hydroxymethyl-7-(4-O-α-L-rhamno- pyranosyloxy-3-methoxyphenyl)-1′-benzofuranpropanol (>2), schizandriside (>3), lyoniresinol (>4), berchemol (>5), (-)-pinoresinol-4-O-β-D-glucopyranoside (>6), hecogenin (>7), chlorogenic acid (>8) and neochlorogenic acid (>9). Their structures were elucidated on the basis of extensive spectroscopic data. The absolute configuration of compounds >1 was established by its CD spectrum. The antibacterial activities of compounds >1->7 were evaluated.