Sesquiterpene lactones from Ixeris tamagawaensis Kitam. III.
作者:HIDEHISA ASADA、TOSHIO MIYASE、SEIGO FUKUSHIMA
DOI:10.1248/cpb.32.3403
日期:——
Two new germacranolides, ixerins H and I, and three new melampolides, ixerins J, K and L were isolated from the polar and less polar fractions of Ixeris tamagawaensis KITAM., respectively. The structures and stereochemistry were established partly by chemical transformations and mainly by the use of 1H-and 13C-nuclear magnetic resonance spectroscopy.