Six insecticidal isoryanodane diterpenoids from the bark and twigs of Itoa orientalis

被引:23
作者
Chai, Xing-Yun [1 ]
Bai, Chang-Cai [1 ]
Shi, Hai-Ming [1 ]
Xu, Zheng-Ren [1 ]
Ren, Hong-Yan [1 ]
Li, Fei-Fei [1 ]
Lu, Ya-Nan [1 ]
Song, Yue-Lin [1 ]
Tu, Peng-Fei [1 ]
机构
[1] Peking Univ, Hlth Sci Ctr, Sch Pharmaceut Sci, Dept Nat Med, Beijing 100083, Peoples R China
关键词
itols A-D; isoryanodane glycosides; Itoa orientalis; X-ray diffraction; insecticidal activity;
D O I
10.1016/j.tet.2008.04.022
中图分类号
O62 [有机化学];
学科分类号
070303 [有机化学]; 081704 [应用化学];
摘要
Four rare isoryanodane diterpenoids namely itols A-D (1-4) and two isoryanosdane glucosides (5 and 6) were isolated from the bark and twigs of Itoa orientalis. Their structures were determined by NMR and MS techniques and the Structure of 1 was confirmed by a single-crystal X-ray diffraction. These six diterpenoids obviously showed insecticidal activity against Spodoptera exigua, with LC(50) 28.62 ppm for 1 and 52.76 ppm for 2, respectively. In anti-inflammatory assay, compounds 1 and 4-6 showed anti-COX-2 activity, with inhibitory rates of 54.7-78.3% at 10 mu m. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码:5743 / 5747
页数:5
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