A new dihydrochalcone-glucoside named confusoside (3) was isolated from the leaves of Symplocos confusa. This compound (3) was elucidated to be the 4'-O-β-D-glucoside of davidigenin (4) (2', 4, 4'-trihydroxyldihydrochalcone) by 1H and 13C nuclear magnetic resonance spectroscopy. No dihydrochalcone-glycoside could be isolated from the leaves of the following plants of Symplocaceae : S. glauca, S. lucida, S. myrtacea, S. liukiuensis, S. prunifolia, S. theophrastaefolia, S. cochinchinensis and S. chinensis var. leucocarpa. However, verbenalin (6) was isolated from the leaves of S. glauca.
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Tanaka et al. (1982) studied this question.