Studies on the Chemical Constituents of Calophyllum Membranaceum Gardn

1Introduction There are more than 200 Calophyllum family in the world, mainly distributed in the semitorpical zones as Malaysia, the Phillipines, India, Sri Lanka, etc., some in South America and the Oceanic as well . In China, 4 species were found, two of which were from Hainan Island :Calophyllum linn and Calophyllum membranaceum Gardn.