Revised structure of cercidinin A, a novel ellagitannin having (R)-hexahydroxydiphenoyl esters at the 3,4-positions of glucopyranose.
The structure of cercidinin A, an ellagitannin isolated from the bark of Cercidiphyllum japonicum, was revised to 1,2,6-tri-O-galloyl-3,4-(R)-hexahydroxydiphenoyl-beta-D-glucose by two-dimensional NMR spectral analysis. Cercidinin A represents the first ellagitannin possessing a hexahydroxydiphenoyl group at the 3,4-positions of a modified 4C1-glucopyranose core.
Tanaka
T
T
School of Pharmaceutical Sciences, Nagasaki University, Japan.
Nonaka
G I
GI
Ishimatsu
M
M
Nishioka
I
I
Kouno
I
I
D002265:Carboxylic Ester Hydrolases; D005960:Glucosides / Q000737:chemistry; D006868:Hydrolysis; D047348:Hydrolyzable Tannins; D009682:Magnetic Resonance Spectroscopy; D019441:Plant Epidermis / Q000737:chemistry*; D010944:Plants / Q000737:chemistry*; D013634:Tannins / Q000737:chemistry*
D005960:Glucosides; D047348:Hydrolyzable Tannins; D013634:Tannins; C432960:cercidinin A; D002265:Carboxylic Ester Hydrolases; C022711:tannase