Resin glycosides from the leaves and stems of Ipomoea digitata.
Alkaline hydrolysis of the ether-soluble resin glycoside (jalapin) fraction of the leaves and stems of Ipomoea digitata L. (Convolvulaceae) gave six organic acids, isobutyric, (S)-2-methylbutyric, tiglic, n-decanoic, n-dodecanoic, and cinnamic acids, and two glycosidic acids, quamoclinic acid A and operculinic acid A. Further, a new genuine resin glycoside, named digitatajalapin I, was isolated from the jalapin fraction, along with three known resin glycosides. Their structures have been determined on the basis of chemical and spectroscopic data.
Ono
Masateru
M
School of Agriculture, Tokai University, 5435 Minamiaso, Aso, Kumamoto, Japan. mono@agri.u-tokai.ac.jp
Fukuda
Hitoshi
H
Murata
Hiroko
H
Miyahara
Kazumoto
K
D006027:Glycosides / Q000302:isolation & purification*; D006868:Hydrolysis; D027741:Ipomoea / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry*; D018515:Plant Leaves; D018547:Plant Stems; D012116:Resins, Plant / Q000302:isolation & purification*
D006027:Glycosides; D010936:Plant Extracts; D012116:Resins, Plant