Obovatol and Obovatal, Novel Biphenyl Ether Lignans from the Leaves of Magnolia obovata THUNB.
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Two new biphenyl ether lignans were isolated from the leaves of Magnolia obovata THUNB and showed antibacterial activity against a cariogenic bacterium, Streptococcus mutans, but was less active than magnolol (5) and honokiol (6).Abstract:
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).read more
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