Calysolins I–IV, Resin Glycosides from Calystegia soldanella
作者:Ayako Takigawa、Haruka Muto、Kiyotaka Kabata、Masafumi Okawa、Junei Kinjo、Hitoshi Yoshimitsu、Toshihiro Nohara、Masateru Ono
DOI:10.1021/np2006378
日期:2011.11.28
Four new resin glycosides having intramolecular cyclic ester structures (jalapins), named calysolins I-IV (1-4), were isolated from the methanol extract of leaves, stems, and roots of Calystegia soldanella, along with one known jalapin (5) derivative. The structures of 1-4 were determined on the basis of spectroscopic data and chemical evidence. They fall into two types, one having a 22-membered ring (1 and 4) and the other with a 27-membered ring (2 and 3). The sugar moieties of 1-4 were partially acylated by some organic acids. Compound 4 is the first example of a hexaglycoside of jalapin.