“…pruniflorum was subjected to chemical investigation leading to the isolation of two new xanthones, pruniflorone K (1) and L (2), together with thirteen known xanthones identified as cochinchinone A (3), 11) formoxanthone B (4), 8) 1,7-dihydroxy-8-methoxyxanthone (5), 12) cochinchinone I (6), 10) 1,3,7-trihydroxy-2,4-diisoprenylxanthone (7), 13) celebixanthone methyl ether (8), 14) vieillardiixanthone B (9), 15) macluraxanthone (10), 16) dulcisxanthone B (11), 17) norcowanin (12), 18) 5,9-dihydroxy-8-methoxy-2,2-dimethyl-7-(3-methylbut-2-enyl)-2H,6H-pyrano [3,2b]xanthone (13), 19) Garcinone B (14), 20) and brasilixanthone (15). 21) Their structures were elucidated by NMR analysis and comparison of their spectroscopic data with those reported in the literatures.…”