Two new biphenyl ether lignans, named obovatol (1) and obovatal (2) were isolated from the leaves of Magnolia obovata THUNB. (Magnoliaceae) and their chemical structures were determined to be 4', 5-diallyl-2, 3-dihydroxybiphenyl ether and 3, 4-dihydroxy-5-(pallylphenoxy) cinnamic aldehyde by means of chemical and spectral studies. The former substance showed antibacterial activity against a cariogenic bacterium, Streptococcus mutans, but was less active than magnolol (5) and honokiol (6).
从厚朴(Magnolia obovata THUNB.(通过
化学和光谱研究,确定了它们的
化学结构为 4',5-
二烯丙基-2,3-二羟基
联苯醚和 3,4-二羟基-5-(烯丙基苯氧基)
肉桂醛。前一种物质对致癌细菌变异链球菌具有抗菌活性,但活性低于 magnolol(5)和 honokiol(6)。