Two New Steroidal Saponins with Antifungal Activity from Hosta plantaginea Rhizomes
作者:Mengyue Wang、Zihan Xu、Ying Peng、Guoyue Zhong、Xiaobo Li
DOI:10.1007/s10600-016-1858-2
日期:2016.11
Two new steroidal saponins, (25R)-3β-hydroxy-5α-spirost-9-en-12-one 3-O-β-D-galactopyranoside (hostasaponin A, 1), and (25R)-2α,3β-dihydroxy-5α-spirost-12-one 3-O-β-D-galactopyranoside (hostasaponin B, 2), together with a new natural product, 2α,3β-dihydroxy-5α-pregn-16-en-20-one (3), were isolated from the rhizomes of Hosta plantaginea, a perennial herb used mainly as an ornamental plant and folk medicine for fungal infection and various inflammations. The active evaluation results showed that 1 and 2 possess potent inhibition activity against Candida albicans, with MIC values less than 20 μg/mL.
两种新的类固醇皂苷,(25R)-3β-羟基-5α-螺甾烯-12-酮 3-O-β-D-半乳糖吡喃糖苷(宿根皂苷 A,1),和 (25R)-2α,3β-二羟基-5α-螺甾烯-12-酮 3-O-β-D-半乳糖吡喃糖苷(宿根皂苷 B,2),以及一种新的天然产物 2α,3β-二羟基-5α-孕烯-16-酮(3),是从主要作为观赏植物和民间药物用于真菌感染及各种炎症的宿根植物的根茎中分离得到的。活性评估结果显示,1 和 2 对白色念珠菌具有效的抑制活性,最小抑制浓度(MIC)值低于 20 μg/mL。