| Literature DB >> 11076545 |
E Cartagena1, A Bardón, C A Catalán, Z N de Hernández, L R Hernández, P Joseph-Nathan.
Abstract
The aerial parts of an Argentinian collection of Acanthospermum hispidum afforded 26 sesquiterpene lactones, including the two guaianolides (1 and 2) having a novel oxygen bridge between C-4 and C-14, three new cis,cis-germacranolides (4, 7, and 8), and two new melampolides (25 and 26). Guaianolides 1 and 2 seem to derive biosynthetically from the germacranolide 27 having the (1)D(14, 15)D(5) conformation. The structures were elucidated using extensive spectroscopic analysis.Entities:
Mesh：
Substances：
Year: 2000 PMID： 11076545 DOI： 10.1021/np9905057
Source DB: PubMed Journal: J Nat Prod ISSN： 0163-3864 Impact factor: 4.050