Two New Triterpenoid Saponins from Morina nepalensis var. alba

Two new triterpenoid saponins, monepaloside K (1) and monepaloside L (2), together with a known saponin, mazusaponin I (3), were isolated from the water-soluble part of the whole plant of Marina nepalensis var. alba Hand.-Mazz. The structures of monepalosides K and L were determined to be 3-O-α-L-arabinopyranosyl-(1-3)-α-D-xylopyranosyl siaresinolic acid (1) and 3-O-β-D-glucopyranosyl-( 1-3)-β-L-arabinopyranosy1 siaresinolic acid 28-O-β-D-glucopyranosyl-(1-6)-β-D-glucopyranoside (2) respectively, on the basis of chemical and spectroscopic evidence.

Monepaloside K, a New Triterpenoid Saponin from Morina nepalensis var. alba Hand. - Mazz.

One new triterpenoid saponin, monepaloside K (1) was isolated from the water-soluble part of the whole plant of a famous Tibetan medicinal herb, morina nepalensis var. alba Hand.-Mazz.. Its structure was determined to be 3-O-a-L-arabinopyranosyl-(13)-b-D- xylopyranosyl siaresinolic acid on the basis of spectroscopic evidences, especially 2D NMR techniques.

白花刺参中的咖啡酰基奎宁酸成分

著名藏药白花刺参Morinanepalensisvar .albaHand . Mazz.的全株的水溶性部分通过硅胶、RP 8、SephadexLH 2 0柱层析分离 ,得到 4个咖啡酰基奎宁酸 1～ 4,运用光谱和波谱方法 ,分别鉴定为 3 O 咖啡酰基 奎宁酸 ( 1 )、3,5 O 双咖啡酰基 奎宁酸 ( 2 )、3,4 O 双咖啡酰基 奎宁酸 ( 3)和 4,5 O 双咖啡酰基 奎宁酸 ( 4 ) .应用 2DNMR图谱 ,对其氢和碳的化学位移进行全归属 ,并报道 1 ,2在氘代甲醇和氘代二甲亚砜两种溶剂下测定1 H和1 3C化学位移 .

白花刺参中两个新三萜皂苷

从著名藏药白花刺参 (Morinanepalensisvar.albaHand Mazz.)全草的水溶性部分中分离得到两个新的乌苏烷型三萜皂苷 ,命名为刺参苷A (1)和刺参苷B (2 ) .应用 2DNMR新技术 ,包括1H 1HCOSY ,HSQC ,HMBC ,2DHMQC TOCSY ,ROESY ,以及选择性激发实验 1DSELTOCSY和 1DSELNOESY ,并结合化学方法 ,确定它们的结构分别为 3 O α L 阿拉伯吡喃糖基 (1→ 3) α L 阿拉伯吡喃糖基坡摸醇酸 2 8 O β D 葡萄吡喃糖基 (1→ 6 ) β D 葡萄吡喃糖苷(1)和 3 O α L 阿拉伯吡喃糖基 (1→ 3) β D 木糖吡喃糖基坡摸醇酸 2 8 O β D 葡萄吡喃糖基 (1→ 6 ) β D 葡萄吡喃糖苷 (2 ) 。