Studies on the Constituents of the Water Extract of the Root of Mulberry Tree (Morus bombycis Koidz)

Abstract

From the water extract of the root bark of Morus bombycis koidz, seven compounds (1—7) were isolated: betaine (1), 1-deoxynojirimycin (2), y-aminobutyric acid (3), L-asparagine (4), l-arginine (5), L-lysine (6) and choline (7). Compound 2, unlike nojirimycin, did not show antibacterial activity and was identified as the component with sweet flavor. Although 2 has been chemically derived from nojirimycin, this is the first report of the isolation of 2 as a natural product. © 1986, The Pharmaceutical Society of Japan. All rights reserved.