Triterpenoids and Steroids from Euphorbia antiquorum

One new lupane triterpenoid, antieuphenone (1), along with seven known triterpenoids (2–8) and eleven steroids (9–19) were isolated from the twigs and leaves of Euphorbia antiquorum. Their structures were determined by 1D and 2D NMR data along with HR-ESI-MS. Except for compounds 4 and 8, all others were obtained from this species for the first time as were the steroids.