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A new (E)4-hydroxy-dodec-2-enedioic acid from the stem bark of Albizzia julibrissin
Mee Jung Jung1, Sam Sik Kang, Jae Sue Choi
1Faculty of Food Science and Biotechnology, Pukyong National University, Busan 608-737, Korea.
Archives of Pharmacal Research
|May 2, 2003
Abstract:
A new unsaturated hydroxy acid was isolated from the stem bark extract of Albizzia julibrissin through repeated silica gel and Sephadex LH-20 column chromatography. The chemical structure of the new acid was determined as (E)-4-hydroxy-dodec-2-enedioic acid on the basis of several spectral data including 2D-NMR. The stereochemical feature of the double bond was determined to be E on the basis of the coupling pattern of related proton signals in the 1H-NMR and COSY experiments.