Antidiabetic Principles of Natural Medicines. II. Aldose Reductase and .ALPHA.-Glucosidase Inhibitors from Brazilian Natural Medicine, the Leaves of Myrcia multiflora DC. (Myrtaceae): Structures of Myrciacitrins I and II and Myrciaphenones A and B.
II, and new acetophenone glucosides, myrciaphenones A and B, were isolated together with several known compounds such as five flavonol glycosides, myricitrin, mearnsitrin, quercitrin, desmanthin-1, and guaijaverin. The structures of new compounds were determined on the basis of physicochemical and chemical evidence. The principal components of this natural medicine including newglucosides, myrciacitrin