Two new cembrane diterpenoids, named populeuphrines A and B (1 and 2), together with three known analogues (3-5) were isolated from the resins of Populus euphratica. The planar structures and relative configurations of 1 and 2 were elucidated by
Five new terpenoids including one new abietane diterpenoid (1), one new aromadendrane diterpenoid (6), two new norsesquiterpenoids (8 and 9), and a new cembrane-derived diterpenoid (12), together with seven known compounds were isolated from Populus euphratica resins. The structures of these new
Populusone (1), a cembrane-type macrocyclic trinorditerpenoid, was isolated from the exudates of Populus euphratica and shown to have an unprecedented carbon skeleton, The structure was identified using spectroscopic methods and X-ray crystallography. A possible pathway for the biosynthesis of 1 was
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