Chemical Diversity in Ligularia Oligonema

The chemical composition of a sample of the title species collected in Pianma, Lushui County, Yunnan Province of China, was examined. Two 3,6,10 oxygenated and two 3,6-oxygenated furanoeremophilanes were isolated. Structures of two new compounds were elucidated. The 3,6-oxygenated furanoeremophilanes were not detected in a sample of the same species previously collected in Laojunshan, Jianchuan County, Yunnan, indicating chemical diversity in the species.