Studies on Chemical Constituents from Ethyl Acetate Extracts of Acer ginnala Maxim. Leaves

To investigate the chemical constituents from ethyl acetate extracts of the leaves of Acer ginnala Maxim, solvent extraction, Silica gel and Sephadex LH-20 column chromatography were used for isolation and their structures were identified by means of spectroscopic and chemical data.Fourteen compounds were isolated and identified as quercetin-3-O-α-L-(3″-galloyl)-rhamnoside(1), 5,7,2′,3′,4′-pentahydroxy flavone(2), kaempferol(3),kaempferol-3-O-β-D-galactopyranoside(4), quercetin-3-O-β-D-lyxoside(5), quercetin(6), quercetin-3-O-β-D-galactopyranoside(7), quercetin-3-O-α-L-(2″-galloyl)-arabinopyranosid(8), quercetin-3-O-α-L-(2″-galloyl)-rhamnoside(9), kaempferol-3-O-α-L-(2″-galloyl)-rhamnoside(10), gallic acid(11), methyl gallate(12), acertannin(13) and β-sitosterol(14).Compounds 4 and 8 are isolated from the plants in genus Acer for the first time and compounds 1,2,5,9 and 10 are isolated from the plants Acer ginnala Maxim. for the first time.