Sesquiterpenes, Nortriterpenes and Other Constituents from Ligularia tongolensis

Abstract

Two new eremophilane-type sesquiterpenes, 3β-(2′-methylbutanoyloxy)-8βH-eremophil-7(11)-ene-12,8α-(14,6α)-diolide (1) and 8βH-eremophil-3,7(11)-diene-12,8α(14,6α)-diolide (2), and two new norursane-type triterpenes, 2α,3β,19α-trihydroxy-28-norurs-12-ene (7) and 2α,3α,19α-trihydroxy-28-norurs-12-ene (8), were isolated from the roots of Ligularia tongolensis, together with nine known compounds. The structures of the new compounds were elucidated by spectroscopic methods.