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论文题目: |
Eucalmaidials A and B, phloroglucinol-coupled sesquiterpenoids from the juvenile leaves of Eucalyptus maideni
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论文题目英文: |
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作者: |
Tian, Li-Wen; Xu, Min; Li, Xing-Cong; Yang, Chong-Ren; Zhu, Hua-Jie; Zhang, Ying-Jun
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论文出处: |
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年: |
2014
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卷: |
4 |
期: |
41 |
页: |
21373-21378 |
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发表期刊: |
RSC ADVANCES |
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摘要: |
Two new phloroglucinol-coupled sesquiterpenoids, eucalmaidials A and B (1 and 2), were isolated from the juvenile leaves of Eucalyptus maideni, along with eight known macrocarpals (3-10), eucalyptone (11), and three known triterpenoids (12-14). Eucalmaidials A and B represent a new skeleton of phloroglucinolcoupled iphionane. Their structures were elucidated by extensive NMR spectroscopic analysis and theoretical calculation of the C-13 NMR chemical shifts. The biosynthetic pathway of 1 and 2 was also postulated. Compounds 1, 3, 5, 7, 8, and 10-14 were evaluated for their antifungal and antibacterial activities. Compound 1 exhibited antifungal activity against Candida glabrata with an IC50 value of 0.75 mu g mL(1). |
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