Sesquiterpene lactones from the endemic Cape Verdean Artemisia gorgonum

Phytochemical study of Artemisia gorgonum Webb resulted in characterisation of three guaianolides (1, 2, 5) and a secoguainolide 4 along with eight known sesquiterpene lactones (6-13). 2D NMR studies also led to revision of the structure of guaianolide 3.