Phytochemical study of Garcinia dulcis (Roxb.) Kurz bark

Abstract

From the bark of Garcinia dulcis (Roxb.) Kurz (Guttiferae), five xanthones, namely 1, 7-dihydroxyxanthone, 12b-hydroxy-des-D-garcigerrin A, 1-O-methylsymphoxanthone, symphoxanthone and garciniaxanthone E were isolated along with the triterpenoid oleanolic acid. In addition, the presence of beta-sitosterol and stigmasterol was detedted. The structure identifications of all the isolates were achieved by analysis of the UV, IR, Ms and NMR data. The unequivocal 13C NMR assignments of all the xanthones, including the revision of the 13C NMR assignments of 1-O-methylsymphoxanthone, were reported.