Lathyrane diterpenes from Euphorbia lathyris

A new 7-hydroxylathyrol ester, L9, in addition to three known lathyrane diterpenes (L1, L3 and L8) have been isolated from the seeds of Euphorbia lathyris. The relative configurations of L9 were established by NOE experiments. 13C NMR data for these diterpenes are also reported.