Description:
Abstract(+)‐ and (−)‐Xanchryones F and G ((+)‐ and (−)‐1 and 2) were isolated from the plant Xanthostemon chrysanthus by chiral separation. Compounds 1 and 2 featured a new carbon skeleton with cinnamoyltriketone‐flavone adducts. Their structures with absolute configurations were elucidated by detailed spectroscopic analyses and chemical calculations. The antibacterial and anti‐inflammatory activities of (+)‐ and (−)‐1 and 2 were evaluated.