the stem and leaf oils of eupatorium coelestinum l., compositae, were analyzed by a combination of high resolution gc, gc/ms and 13c-nmr. more than 30 components were identified, representing 75-77% of the oils. the principal oil constituents were methyl chavicol (9.7-45.2%), hornyl acetate (6.2-12.6%), camphene (0.3-11. 9%) and cis-cadin-4-en-7 -01 (5.2- 10 .9%) in the stem and leaf oils, respectively. the oils contained about 500al of oxygenated compounds, which contributed to the special odor of these oils.