A new casbane diterpene from <i>Euphorbia pekinensis</i>

<div><p>A new casbane diterpenoid, referred to as pekinenin G, together with one cembrane diterpene and four known casbane diterpenoids were isolated from the roots of <i>Euphorbia pekinensis</i>. Their structures were elucidated on the basis of spectroscopic studies and comparison with related known compounds. The six compounds showed different cytotoxic activities against four human cancer cell lines.</p></div