The air-dried and crushed rhizomes of Hedychium coccineum were extracted with MeOH, and the extract was
partitioned with EtOAc-H2O. The EtOAc extract was isolated by various separation techniques (Silica gel, Sephadex LH-
20, RP-18 column chromatography and HPLC). By means of spectroscopic analysis, the isolated compounds were identi⁃
fied as 5-hydroxy-3,7,4'-trimethoxyflavone (1), 3,5-dihydroxy-7,4'-dimethoxyflavone (2), kaempferol-4'-O-methylether
(3), ermanin (4), dihydrokaempferide (5) and aromadendrin-7,4'-dimethyl ether (6). All the compounds were isolated from
H. coccineum for the first time. |