T Sekine   M Kamiya   F Ikegami   JF Qi   
NATURAL PRODUCT LETTERS 12(3) 237-239 1998年
A new macrocyclic diterpene, esulol A (1), was isolated from the aerial parts of Chinese Euphorbia esula L. (Euphorbiaceae). The relative structure was elucidated by spectroscopic analyses as a novel highly oxygenated jatrophane derivative.