Rotundifolides A and B,Two New Enol‐Derived Butenolactones from the Bark of Litsea rotundifolia var. oblongifolia

Two new enol‐derived butenolactones, rotundifolides A ( 1 ) and B ( 2 ), along with four known related compounds, lincomolide C ( 3 ), lincomolide A ( 4 ), marliolide ( 5 ), and litsenolide A₁ ( 6 ), were isolated from the bark of Litsea rotundifolia var. oblongifolia. The structures of the new metabolites were characterized by spectroscopic methods and comparison with known compounds.