STUDIES ON BARKS OF FAMILY SALICACEAE .20. VARIATIONS IN HOT WATER EXTRACTIVES OF POPULUS BALSAMIFERA BARK

The hot water extractives of both the twig and the trunk barks of Populus balsamifera cut in May were extracted fractionally with ethyl acetate, and the individual ethyl acetate extracts were fractionated by elution chromatography with water on polyamide columns. The twig bark contained more ethyl acetate-soluble material than did the trunk bark and, in general, the yields of individual crystalline components were higher in the twig bark than in the trunk bark. In addition to previously isolated components of P. balsamifera bark, trichoside and gentisyl alcohol were isolated from the trunk bark, and trichocarpigenin was isolated from the twig bark in the present study. This is the first recorded isolation of gentisyl alcohol per se from any higher plant material. © 1970.