Microbial Transformation of Sesquiterpene Lactones by the Fungi <i>Cunninghamella echinulata</i> and <i>Rhizopus oryzae</i>
作者:Alejandro F. Barrero、J. Enrique Oltra、Délio S. Raslan、Dênia A. Saúde
DOI:10.1021/np980520w
日期:1999.5.1
13-dihydrodehydrocostuslactone (12), a new natural product. R. oryzae converted 4 into both Delta11(13)-dihydrogenation and Delta10(14)-epoxidation products (16 and 17). Both fungi transformed 5 into (-)-16-(1-methyl-1-propenyl)eremantholanolide (13), providing experimental evidence for the biosynthesis of the eremantholide hemiketal unit. Compounds 3 and 6 were not metabolized by either fungus under the test conditions
Three new sesquiterpene glycosides, ixerin U (III), ixerin V (IV), and ixerin W (XI), in addition to eight known sesquiterpenes, have been isolated from Ixeris dentata NAKAI. The structures of the new compounds were determined on the basis of chemical and spectral data.
除了八种已知的倍半萜外,还从 Ixeris dentata NAKAI 中分离出三种新的倍半萜糖苷:ixerin U (III)、ixerin V (IV) 和 ixerin W (XI)。新化合物的结构是根据化学和光谱数据确定的。