Abstract
As an example of the application of cold extraction using aqueous solution of borax, extraction of myricitrin from the bark of Myrica rubra Sieb. et Zucc. was carried out. The raw material was first heated at 80° for one hour and the extraction yielded crystals of m.p. 193-194° (decomp.). Acid decomposition of the product yielded myricetin and rhamnose which proved the crystals to be those of myricitrin. The yield was 5.5% which was far inferior to that of 7.5% obtained by warm methanol extraction. Warm methanol extraction of the heartwood gave myricitrin in 0.19% yield. Presence of ampeloptin, the flavanone corresponding to myricetin, was not detected either in the bark or in the heartwood.
