Three minor new compounds from the aerial parts of Leonurus japonicus

Phytochemical investigation of the aerial parts of Leonurus japonicus led to the isolation of one new labdane diterpenoid, leojaponin D (1) and two new ionone derivatives, leojaponones A and B (2 and 3), together with seven known diterpenoids (4–10). Their structures were elucidated by extensive 1D and 2D NMR spectroscopic data and by comparison with data reported in the literature. Selected isolates were evaluated their effects on Jurkat IL2 secretion.

Graphical abstractPhytochemical investigation of the aerial parts of Leonurus japonicus led to the isolation of one new labdane diterpenoid (1) and two new ionone derivatives (2 and 3), together with seven known diterpenoids (4–10). Selected isolates were evaluated their effects on Jurkat IL2 secretion.Figure optionsDownload full-size imageDownload as PowerPoint slide