Abstract: To investigate the chemical constituents of the leaves of Cinnamomum camphora. Silica gel,Sephadex LH-20 and Polyamide column chromatography were applied for isolation of the constituents.Nine compounds (1-9 ) were isolated and their structures were identified by spectroscopic analysis as following:kaempferol-3-O-β-D-glucopyranoside ( 1 ),quercetin-3-O-β-D-rhamnopyranoside ( 2 ),quercetin-3-O-β-D-glucopyranoside ( 3 ),isorhamnetin-3-O-β-D-glucopyranoside ( 4),schizandriside (5 ),kaempferol-3-O-β-D-rutinoside ( 6 ),isorhamnetin-3-O-β-D-rutinoside ( 7),neo-sesamin (8) and maculatin (9).Compound 1 was isolated from Cinnamomum spp.for the first time.Compounds 4,5 and 8 were isolated from Lauraceae for the first time.

Key words: Cinnamomum camphora, chemical constituents, flavonoids, lignans, Lauraceae