铁破锣皂苷O和P的结构及其药理活性

目的研究我国特有药用植物铁破锣［Bessia calthaefolia (Maxim.) Ulhr.］根茎的化学成分。方法利用各种色谱技术进行分离,根据化合物的光谱数据(IR,MS,1HNMR,13CNMR,2DNMR)和化学方法鉴定其结构,并对所得单体成分进行药理活性筛选。结果从甘肃产铁破锣根茎的氯仿萃取物中分离得到2个化合物,分别鉴定为:(20S,24S)-15α-acetoxy-16β,24;20,24-diepoxy-9,19-cyclolanostane-3β,25-diol-3-O-β-D-xylopyranoside (I)和(20S,24R)-15α-acetoxy-9,19-cyclolanostane-3β,16β,20,24,25-pentaol-3-O-β-D-xylopyranoside (II),分别命名为铁破锣皂苷O(beesioside O)和铁破锣皂苷P(beesioside P)。结论I和II为新化合物,I有免疫抑制、抑制血管生成和抑制成骨细胞增殖活性。

STRUCTURES AND PHARMACOLOGICAL ACTIVITIES OF BEESIOSIDES O AND P

AIM: To investigate the chemical constituents of the rhizomes of Beesia calthaefolia native to China in order to obtain a more comprehensive understanding of its effective components. METHODS: Compounds were isolated by column chromatography with silica gel. Their structures were elucidated by spectral analysis and chemical evidence. Compounds identified were subjected to pharmacological evaluation. RESULTS: Two novel compounds were isolated and identified as (20S, 24S)-15 alpha-acetoxy-16 beta, 24; 20, 24-diepoxy-9, 19-cyclolanostane-3 beta, 25-diol-3-O-beta-D-xylopyranoside (I) and (20S, 24R)-15 alpha-acetoxy-9, 19-cyclolanostane-3 beta, 16 beta, 20, 24, 25-pentaol-3-O-beta-D-xylopyranoside (II), named beesioside O and beesioside P. CONCLUSION: Compounds I and II are new compounds. Compounds I exhibited immunosuppressive activity and could inhibit angiogenesis as well as inhibit the proliferation of osteoblast. Compound II displayed remarkable inhibition activity against calcium channel receptor.