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Note | Regular issue | Vol 81, No. 10, 2010, pp.2335-2341
Published online, 11th August, 2010
DOI: 10.3987/COM-10-11994
New Xanthones from the Barks of Cratoxylum sumatranum ssp. neriifolium

Warraphong Nuangnaowarat, Worrapong Phupong,* and Masahiko Isaka

*School of Science, Walailak University, Thaiburi, Thasala, Nakhon Si Thammarat 80161, Thailand

Abstract

Three new prenylated xanthones, neriifolone A-C (1-3), and eight known xanthones (4-11) were isolated from the barks of Cratoxylum sumatranum ssp. neriifolium. All the new compounds were characterized by intensive spectroscopic methods (1D and 2D NMR, UV and IR spectroscopy and mass spectrometry).