Abstract
13C NMR analysis of hot water extracts from young leaves of Photinia glabra gave prominent signals unassignable to any known components. Guided by the characteristic 13C NMR signals, a new glucoside ester was isolated. The structure of this compound was determined to be 4( S)- O-(6- O-caffeoyl-β- d-glucopyranosyl)-2-pentanone by 1H and 13C NMR analyses and other chemical evidence.
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