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Microtropins J-P: 6’-O-(2”S,3”R)-2”-Ethyl-2”,3”-Dihydroxybutyrates of Phenolic Alcohol ß-D-Glucopyranosides from the Branches of Microtropis japonica

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DOI: 10.4236/ajps.2013.410242    3,466 Downloads   4,808 Views   Citations

ABSTRACT

From the branches of Microtropis japonica (Celastraceae), seven phenolic alcohol glucosides, named microtropins J-P (1-7), were isolated. The 6-position of glucose was esterified with 2-ethyl-2,3-dihydroxybutyric acid. Microtropin K (2) was hydrolyzed under a mild basic condition to give methyl (2S,3R)-2-ethyl-2,3-dihydroxybutyrate, whose absolute structure was determined by the comparison of NMR data and the optical rotation value with that reported.

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Y. Uemura, S. Sugimoto, K. Matsunami, H. Otsuka and Y. Takeda, "Microtropins J-P: 6’-O-(2”S,3”R)-2”-Ethyl-2”,3”-Dihydroxybutyrates of Phenolic Alcohol ß-D-Glucopyranosides from the Branches of Microtropis japonica," American Journal of Plant Sciences, Vol. 4 No. 10, 2013, pp. 1954-1959. doi: 10.4236/ajps.2013.410242.

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