Absolute stereostructure of carabrane-type sesquiterpene and vasorelaxant-active sesquiterpenes from Zedoariae Rhizoma

被引:56
作者
Matsuda, H [1 ]
Morikawa, T [1 ]
Ninomiya, K [1 ]
Yoshikawa, M [1 ]
机构
[1] Kyoto Pharmaceut Univ, Yamashina Ku, Kyoto 6078412, Japan
关键词
pharmacologically active compounds; terpenes and terpenoids; cyclopropanes; stereochemistry;
D O I
10.1016/S0040-4020(01)00828-6
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
The aqueous acetone extract of Zedoariae Rhizoma was found to show inhibitory effects on contractions induced by high concentrations of potassium cation (K+) in isolated rat aortic strips. From the extract, two new carabrane-type sesquiterpenes, curcarabranols A and B, were isolated together with a few carabrane-type sesquiterpenes, such as curcumenone and 4S-dihydrocurcumenone. Their absolute stereostructures were determined on the basis of chemical and physicochemical evidence, which included the application of the modified Mosher's method and chemical conversion from curcumenone to curcarabranols A and B. In addition, several sesquiterpenes and diaryl-heptanoids (e.g. germacrone, glechomanolide, isocurucmenol, beta -eudesmol, and beta -dictyopterol) showed potent inhibitory effects on contractions induced by high concentrations of K+ in isolated rat aortic strips (inhibition > 80% at 100 muM), while they did not inhibit norepinephrine-induced contractions, so that the vasorelaxant activities of these sesquiterpenes were presumed to be dependent on their calcium channel-blocking activity. (C) 2001 Elsevier Science Ltd. AE rights reserved.
引用
收藏
页码:8443 / 8453
页数:11
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