天然产物研究与开发 ›› 2022, Vol. 34 ›› Issue (2): 177-184.doi: 10.16333/j.1001-6880.2022.2.001

• 研究论文 •    下一篇

小花杜鹃中两个新的木脂素

范贤哲1,朱阳利1,袁荣文1,邓  丽1,伍念荣2,张立军1,廖海兵1*   

  1. 1广西师范大学化学与药学学院 省部共建药用资源化学与药物分子工程国家重点实验室,桂林 541004;2广西桂林锐德检测认证技术有限公司,桂林 541100
  • 出版日期:2022-02-28 发布日期:2022-03-07
  • 基金资助:
    广西壮族自治区自然科学基金(2018GXNSFBA138 006);广西中青年能力提升项目(2018KY0089)

Two new lignans from the Rhododendron minutiflorum

FAN Xian-zhe1,ZHU Yang-li1,YUAN Rong-wen1,DENG Li1,WU Nian-rong2,ZHANG Li-jun1,LIAO Hai-bing1*   

  1. 1State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources,School of Chemistry and Pharmaceutical Sciences,Guangxi Normal University,Guilin 541004,China;2Rid Testing and Certification (Guangxi) Inc.,Guilin 541100,China

  • Online:2022-02-28 Published:2022-03-07

摘要:

研究小花杜鹃(Rhododendron minutiflorum)的化学成分及其α-葡萄糖苷酶抑制活性。采用正相硅胶、ODS、Sephadex LH-20和HPLC等多种色谱技术,从小花杜鹃的95%乙醇提取物中分离得到9个化合物,通过波谱分析和文献数据对比,鉴定其结构分别为rhodominutinan A(1)、rhodominutinan B(2)、3,4-di(4-hydroxy-3-methoxybenzyl) tetrahydrofuran(3)、venkatasin(4)、苔色酸甲酯(5)、苔黑酚羧酸乙酯(6)、2,4-二羟基-3,6-二甲基苯甲酸甲酯(7)、芹菜素(8)、山奈酚(9)。其中化合物12为新的木脂素,化合物3~9为首次从小花杜鹃中分离得到。通过α-葡萄糖苷酶抑制剂体外筛选模型评价化合物的潜在降血糖活性,结果表明化合物89具有较好的α-葡萄糖苷酶抑制活性,IC50值分别为57.51±6.35、54.70±3.67 μM。

关键词: 小花杜鹃, 木脂素, 化学成分, α-葡萄糖苷酶抑制活性

Abstract:

To study the chemical constituents and their α-glucosidase inhibitory activity of Rhododendron minutiflorum.Nine compounds were isolated and purified from the 95% ethanol extract of R. minutiflorum by repeated column chromatography such as silica gel,Sephadex LH-20,ODS and HPLC.These chemical structures were identified as rhodominutinan A (1),rhodominutinan B (2),3,4-di(4-hydroxy-3-methoxybenzyl) tetrahydrofuran (3),venkatasin (4),methyl orsellinate (5),ethyl orsellinate (6),methyl 2,4-dihydroxy-3,6-dimethylbenzoate (7),apigenin (8),kaempferol (9) by spectroscopic data analysis and comparison with literatures reported.In addition,compounds 1 and 2 are new lignans,and 3-9 are isolated from the R. minutiflorum for the first time.The in vitro hypoglycemic activity of the obtained compounds was evaluated by the α-glucosidase inhibitor screening method.The results showed that compounds 8 and 9 display moderate inhibitory activity against α-glucosidase with IC50 values of 57.51±6.35,54.70±3.67 μM,respectively.

Key words: Rhododendron minutiflorum, lignan, chemical composition, α-glucosidase inhibitory activity

中图分类号:  R932