title: New Eremophilane Type Lactones from the Roots of Ligularia veitchiana.
abstract: Phytochemical investigation of the roots of LIGULARIA VEITCHIANA has resulted in the characterization of two new eremophilanolides together with beta-sitosterol, stigmasterol, taraxol, and liguhodgsonal whose structure was further confirmed by the (13)C-NMR techniques. The structures of the new constituents were elucidated by spectroscopic methods and shown to be 1beta, 10beta-epoxy-6beta(2'-hydroxymethylacryloyloxy)-8beta-hydroxy-eremophila-7(11)-en-12,8alpha-olide ( 1) and 1beta, 10beta-epoxy-6beta-(2'-hydroxymethylacryloyloxy)-8beta-ethoxy-eremophila-7(11)-en-12,8alpha-olide ( 2).
authors.affiliation: State Key Laboratory of Applied Organic Chemistry at Lanzhou University. Lanzhou 730000, People's Republic of China.
authors.forename: Z
authors.initials: Z
authors.lastname: Jia
authors.forename: Y
authors.initials: Y
authors.lastname: Zhao
authors.forename: R
authors.initials: R
authors.lastname: Tan