Sesquiterpenoids and Phenolics from Crepis conyzifolia

Abstract

From the roots of Crepis conyzifolia, two new and two known guaianolides were isolated together with three known phenylpropanoids. Structures of the new compounds were established as 8β-hydroxy-4β, 15-dihydrozaluzanin C and 4β, 15, 11β, 13-tetrahydrozaluzanin C-3-O-β-glucopyranoside by spectral methods. The identity of 8-epiisolippidiol and dentalactone was also discussed.