Five new resin glycosides having macrolactone structures (jalapins), named calysolins V–IX (1–5), were isolated from the leaves, stems, and roots of Calystegia soldanella ROEM. et SCHULT. (Convolvulaceae). Their structures were determined on the basis of spectroscopic data as well as chemical evidence. The isolated compounds could be classified into two macrolactone types—one having a 22-membered ring (1–4) and the other with a 27-membered ring (5). The sugar moieties of 1–5 were found to exist in partially acylated forms comprising 2S-methylbutyric acid and tiglic acid. Compounds 4 and 5 are the first representatives of the calysolic acid C as the component glycosidic acid. Additionally, the antiviral activity of 1–5, together with calysolins I–IV and soldanelline B, which are previously isolated jalapins from this plant, toward herpes simplex virus type 1 was evaluated. All the compounds showed antiviral activity.
从旋花科植物Calystegia soldanella
ROEM. et
SCHULT.(旋花科)的叶子、茎和根中分离出五种具有大环内酯结构的新型
树脂糖苷(jalapins),命名为calysolins V-IX(1-5)。根据光谱数据和
化学证据确定了它们的结构。分离出的化合物可分为两种大环
内酯类型——一种具有22个成员环(1-4),另一种具有27个成员环(5)。1-5的糖部分以部分酰化形式存在,包括2S-甲基
丁酸和
丁烯酸。化合物4和5是calysolic acid C作为糖苷酸成分的代表。此外,还评估了1-5以及之前从该植物中分离出的jalapins calysolins I-IV和soldanelline B对1型单纯疱疹病毒的抗病毒活性。所有化合物均显示出抗病毒活性。