Isolation and structure revision of pepluane diterpenoids from Euphorbia peplus

A new pepluane diterpene polyester (2) was isolated from a CH2Cl2 extract o f the whole, undried plant of Euphorbia peplus, together with the known com pound 1. The structures were established by high-field spectroscopic method s, including 2D NMR techniques, and by X-ray crystallography, and the stere ostructure of the first member of the pepluane diterpenoids (1) was revised .