Chemical constituents of Brazilian Propolis from the state of Bahia and their growth inhibitory activities against cancer cells

<p>A novel 2-phenoxychromone (1) and five known flavones (2-6) were isolated from northeastern Brazilian propolis in the state of Bahia. The chemical structures of these six compounds were determined by spectroscopic investigations and single-crystal X-ray analysis. The isolated compounds showed growth-inhibitory activities, in varying degrees, against human tumor cell lines. This is the first report on the discovery of a novel 2-phenoxychromone from propolis.</p> <p>A novel 2-phenoxychromone (<b>1</b>) and five known flavones (<b>2–6</b>) were isolated from Brazilian propolis in the state of Bahia.</p>