Indonesian Medicinal Plants. XXI. Inhibitors of Na+/H+ Exchanger from the Bark of Erythrina variegata and the Roots of Maclura cochinchinensis.
作者:Motomasa KOBAYASHI、Taifo MAHMUD、Naoki YOSHIOKA、Hirotaka SHIBUYA、Isao KITAGAWA
DOI:10.1248/cpb.45.1615
日期:——
Through bioassay-guided separation of the methanol extracts of Indonesian medicinal plants, three inhibitors of the Na+/H+ exchange system, erythrinin B (2), euchrenone b10 (3), and 1, 3, 5-trihydroxy-4-(3-methylbut-2-enyl)xanthen-9-one (4), were isolated from the bark of Erythrina variegata (Fabaceae)(for 2) and the roots of Maclura cochinchinensis (Moraceae)(for 2, 3, 4). Compounds 2, 3, and 4 significantly inhibited the Na+/H+ exchanges system of arterial smooth muscle cells, with minimum inhibitory concentrations of 1.25, 1.25, and 10μg/ml, respectively. Three new prenylated xanthones named isocudraniaxanthones B (5) and A (7) and isoalvaxanthone (9) were also isolated from M. cochinchinensis and the chemical structures were elucidated on the bases of their chemical and physicochemical properties.
通过生物测定法分离印度尼西亚药用植物的甲醇提取物,从刺桐(Fabaceae)树皮(化合物2)和木荷(Moraceae)根(化合物2、3、4)中分离出三种钠/氢离子交换系统抑制剂:刺桐素B(2)、刺桐素B10(3)和1,3,5-三羟基-4-(3-甲基丁-2-烯基)氧杂蒽-9-酮(4)。化合物2、3和4显著抑制动脉平滑肌细胞的钠/氢离子交换系统,最小抑制浓度分别为1.25、1.25和10μg/ml。从木荷中分离出三种新的异戊烯基氧杂蒽酮,分别是异刺桐素氧杂蒽酮B(5)、异刺桐素氧杂蒽酮A(7)和异刺桐素氧杂蒽酮(9),并根据其化学和物理化学性质阐明了其化学结构。