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[摘要]：In the course of a chemotaxonomical study of Chinese Castanopsis species, two previously unknown flavan-3-ols, named sclerophynins A and B, were isolated from the leaves of C. sclerophylla, together with five related known compounds. On the basis of spectroscopic analysis, the new compounds were characterized to be (4S,8R,9S)-4-(3,4-dihydroxyphenyl)-8-(3,4,5-trihydroxy-phenyl)-3,4,9,10- tetrahydro-5,9-dihydroxy-2H,8H-benzo[1,2-b:3,4-b']dipyran-2-one and (4S,7S,8R)-4,8-bis(3,4-dihydroxypheny1)-3,4,6,7-tetrahydro-5-gluco-pyran osyloxy-7-hydroxy-2H,8H-benzo[1,2-b:5,4-b']dipyran-2-one, respectively. |
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