Chemical Constituents of the Roots of Lindera chunii

A new sesquiterpenoid dimer, lindenanolide I ( 1 ), and two new butanolides, (2 E ,3 R ,4 S )-2-dodecylinene-3-hydroxy-4-ethoxy-4-methylbutanolide ( 3 ) and (2 E ,3 R ,4 S )-2-tetradecylinene-3-hydroxy-4-ethoxy-4-methylbutanolide ( 4 ), together with five known compounds ( 2 , 5–8 ), were isolated from the roots of Lindera chunii . The structures of these compounds were elucidated on the basis of extensive spectroscopic analysis and by comparison of the data with those of related secondary metabolites. The absolute configuration of 1 was identified by electronic circular dichroism (ECD) analysis. Compounds 5–8 were isolated from this plant for the first time.