title: Calysolins I-IV, resin glycosides from Calystegia soldanella.
abstract: 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.
authors: School of Agriculture, Tokai University, 5435 Minamiaso, Aso, Kumamoto 869-1404, Japan.
authors: Ayako
authors: A
authors: Takigawa
authors: Haruka
authors: H
authors: Muto
authors: Kiyotaka
authors: K
authors: Kabata
authors: Masafumi
authors: M
authors: Okawa
authors: Junei
authors: J
authors: Kinjo
authors: Hitoshi
authors: H
authors: Yoshimitsu
authors: Toshihiro
authors: T
authors: Nohara
authors: Masateru
authors: M
authors: Ono
mesh_terms: D031253:Calystegia / Q000737:chemistry*; D002240:Carbohydrate Sequence; D006027:Glycosides / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D018515:Plant Leaves / Q000737:chemistry; D018517:Plant Roots / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D012116:Resins, Plant / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D006027:Glycosides; D012116:Resins, Plant