Labdane Diterpenes and Flavonoids from Leonurus japonicus

Chemical investigation of the aerial part of Leonurus japonicus led to the isolation and characterization of a new labdane-type diterpene, named 3α-acetoxy-15-O-methylleopersin C (3), and a new acylated rutin derivative, named 2′′′-syringylrutin (9), along with seven known compounds, including a labdane-type diterpene and six flavonoids. The structures of the new compounds were established by spectroscopic methods.

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