Three steroids and four phenylpropanoid glycosides were isolated from leaves of Getto (Alpinia speciosa K. Sebum), and their structures were determined based on UV, MS, 1H-NMR, and 13C-NMR spectroscopic data.
The structures were β-sitosterol (1), campesterol (2), stigmasterol (3), coniferin (4), syringin (5), 2, 3-dihydro-2- (4-β-D-glucopyranosyl-3-methoxyphenyl) -3-hydroxymethyl-7-hydroxy-5-benzofranpropanol (6), and citrusin B (7). Compounds 4 and 5 showed no effect for the germination of lettuce.
All compounds isolated in this study, 17 were found in the leaves of Getto for the first time.
