Sesquiterpene lactones and a myoinositol from glandular trichomes ofViguiera quinqueremis (Heliantheae; Asteraceae)

摘要

The extract of the floral parts of Viguiera quinqueremis afforded, in addition to known compounds, six new sesquiterpene lactones as well as a new myoinositol derivative. All compounds were detected in glandular trichomes which were collected micromechanically from the anther appendages and were analyzed by HPLC. Structure identification was performed by H-1 NMR measurements including LC NMR and LC MS experiments.