Isolation from the leaves of Thalictrum minus L. var. microphyllum Boiss. of anisaldehyde (1) and the alkaloids thalactamine (2), takatonine (3), and the new base thalimicrinone (4) is reported. In a previous publication, the isolation of thirteen alkaloids from the roots and rhizomes of Thalictrum minus L. var. microphyllum Boiss. was reported (1). Here, an investigation of the alkaloids from the leaves of the plant is described.