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The first N,8′-coupled naphthylisoquinoline alkaloids with free phenolic OH groups, 4′-O-demethylancistrocladinium A and 6,4′-O-didemethylancistrocladinium A, have been isolated from the leaves and bark of the Vietnamese liana Ancistrocladus cochinchinensis, along with its known, non-phenolic parent compound, ancistrocladinium A, and four C,C-coupled representatives. The structure elucidation was...
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