Auriculatin 4′-O-Glucoside: A New Prenylated Isoflavone Glycoside fromErythrina eriotricha1

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Abstract
In addition to known compounds, sigmoidin C and 8-(3,3-dimethylallyl)-erythrinin C, also called senegalensin, a new isoflavone glycoside designated auriculatin 4′-O-glucoside was isolated from the chloroform extract of the stem bark of Erythrina eriotricha. Its structure was elucidated as 7,6-(2′″,2′″-dimethyl-2 H-pyrano)-2′,5-dihydroxy-8-(3,3-dimethylallyl)-isoflavone 4′-O-β-D-glucoside on the basis of spectroscopic methods and chemical evidence.

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