Front Cover: Chiral Isolation and Absolute Configuration of (+)‐ and (−)‐Xanchryones F and G from Xanthostemon chrysanthus (C&B 1/2020)

Front Cover . The plant Xanthostemon chrysanthus (Myrtaceae) is widely distributed in northern Australia and southeast Asia. In a search for structurally unique and bioactive natural products from Myrtaceae plants, the first examples of cinnmaoyltriketone‐flavone adducts with new skeleton, (+)‐ and (−)‐xanchryones F and G ((+)‐ and (−)‐ 1 and 2 ), were obtained by chiral HPLC from X. chrysanthus . These compounds have the same planar structure, among which, 1 and 2 are C‐9' epimers, (±)‐ 1 and (±)‐ 2 are two pairs of enantiomers. Interestingly, each enantiomer existed as keto‐enol tautomers in solution, as reported by Fen Liu , Yan Wu et al . in their full paper at 10.1002/cbdv.201900683.