Author(s)

Yuka Uemura, Sachiko Sugimoto, Katsuyoshi Matsunami, Hideaki Otsuka, Yoshio Takeda

Department of Natural Products Chemistry, Faculty of Pharmacy, Yasuda Women’s University, Hiroshima, Japan..
Department of Pharmacognosy, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan;.

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.

Microtropis japonica; Celastraceae; Microtropin; (2S, 3R)-2-Ethyl-2, 3-Dihydroxybutyrate

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.