Nine diarylheptanoids, including a new compound 4v, were isolated from the bark of Alnus viridis.
Activity of A. viridis diarylheptanoids was compared to structural analogs from Alnus glutinosa.
Presence of 3′ and 3″-OH groups had negative influence on cytotoxic activity.
Carbonyl group at C-3 positively affected cytotoxicity of A. viridis diarylheptanoids.
Small chemical structure differences had major effect on cell cycle, apoptosis and redox status.