| Literature DB >> 12880312 |
César A N Catalán1, María Del R Cuenca, Luis R Hernández, Pedro Joseph-Nathan.
Abstract
The aerial parts of Mikania thapsoides afforded six new cis,cis-germacranolide-type sesquiterpene lactones (1-6), of which three (1-3) have an unusual 3,4-epoxy function, and also afforded two new melampolides (7 and 8). All compounds have a trans C-8 lactone ring closure. Their structures were elucidated using 1D and 2D NMR measurements, and the absolute configuration of 1 was determined using the Mosher ester method.Entities:
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Year: 2003 PMID： 12880312 DOI： 10.1021/np030055p
Source DB: PubMed Journal: J Nat Prod ISSN： 0163-3864 Impact factor: 4.050