Abstract
Extraction of Dalbergia baroni Baker heartwood gave a new 4-phenylcoumarin, melannein (Ia) in addition to the known dalbergin (II), S-4-methoxydalbergione (III) and formononetin (IV). The constitution of melannein is established. Syntheses of O-dimethylmelannein and O-diethylmelannein are described.
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