Xanthones and coumarins from Kielmeyera lathrophyton

three xanthones and six coumarins were isolated from the hexane extract of the stems of kielmeyera lathrophyton, among them two new prenylated xanthones 1,5-dihydroxy -6'-methyl -6' -(4-methyl -3-pentenyl) -pyrano(2',3':3,2) -xanthone, 1,7 -dihydroxy -6' -methyl -6' -(4 -methyl -3 -pentenyl) -pyrano(2',3':3,2) -xanthone, and two new 4 -s -butylcoumarins 7 -hydroxy -8 -(3-methyl -1 -oxobutyl) -4 -s -butyl -6',6' -dimethylpyrano (2',3':5,6) -coumarin, 7 -hydroxy -8 -(2-methyl -1 -oxobutyl) -4 -s -butyl -6',6' -dimethylpyrano (2',3':5,6) -coumarin, along with the compounds, d -tocotrienol, friedelin, 24a -ethylcholest -5 -en -3 -one, and , 24a -ethylcholest -5,22 -dien -3 -ol. these compounds were identified by comparison with literature data, and their spectroscopic properties.