The study of the chemical constituents of the nut and root bark of Calophyllum inophyllum has led to the isolation of a xanthone derivative, inoxanthone, 3, along with 12 known compounds. The structures of these compounds were determined by spectroscopic methods. The isolates were evaluated for their antimicrobial and cytotoxic activities. The study of the chemical constituents of the root bark and the nut of Calophyllum inophyllum has resulted in the isolation and characterization of a xanthone derivative, named inoxanthone, 3, together with 12 known compounds: caloxanthones A, 4 and B, 5, macluraxanthone, 6, 1,5-dihydroxyxanthone, 7, calophynic acid, 8, brasiliensic acid, 9 inophylloidic acid, 10, friedelan-3-one, 11, calaustralin, 12, calophyllolide, 13, inophyllums C, 14 and E, 15. Their structures were established on the basis of spectral evidence. Their in vitro cytotoxicity against the KB cell line and their antibacterial activity and potency against a wide range of micro organisms were evaluated. © 2004 Elsevier Ltd. All rights reserved.
