Homoisoflavonoids and stilbenes from the bulbs of Scilla nervosa subsp rigidifolia

Thirteen homoisoflavonoids, nine of which are new: 3-(4-methoxybenzyl)-5,7- dimethoxychroman-4-one, 3-(4-hydroxy-3-methoxybenzyl)-5-hydroxy-7-methoxych roman-4-one, 3-(4-methoxybenzylidene)-5,7-dihydroxy-6-methoxychroman-4-one, 3-(4-hydroxybenzylidene)-5-hydroxy-7-methoxychroman-4-one, 3-(4-hydroxy-3- methoxybenzyl)-5-hydroxy-6,7-dimethoxychroman-4-one, 3-(3,4-dimethoxybenzyl )-5,7-dihydroxychroman-4-one, 3-(4-methoxybenzyl)-6-hydroxy-5,7-dimethoxych roman-4-one, 3-(4-hydroxybenzyl)-5,6,7-trimethoxychroman-4-one and 3-(4-met hoxybenzyl)-8-hydroxy-5,7-dimethoxychroman-4-one, were isolated from the bu lbs of Scilla nervosa together with four known ones and three known stilben e derivatives. The structures of these secondary metabolites were character ized by spectroscopic means and by comparison with published information fo r known compounds. (C) 1999 Elsevier Science Ltd. All rights reserved.