Extractives of Cercidiphyllum Japonicum Twigs: Isolation and Structural Elucidation of a New Galloylflavonol Glycoside, Anomeric Tannins and Flavonoids

In a chemical analysis conducted on the twigs of Cercidiphyllum japonicum, researchers isolated seven compounds, including a newly identified galloylflavonol glycoside (8-methoxykaempferol-4'-O-galloyl-3-O-α-L-rhamnopyranoside (VII)) and six known phenolics. Among the known compounds, four (3,4,6-tri-O-galloyl-β-D-glucopyranoside (I), pedunculagin (II), kaempferol-3-O-α-L-rhamnopyranoside (IV), and 8-methoxykaempferol (VI)) were reported for the first time in the genus Cercidiphyllum. The structural elucidation of these compounds was achieved through spectroscopic methods and physicochemical analysis. The discovery of these compounds, particularly the new galloylflavonol glycoside, may have implications for the development of new medicinal or pharmaceutical applications. The study did not involve human subjects as it was focused on chemical extraction and analysis.