Abstract
The ether-soluble resin glycoside (‘jalapin’) fraction obtained from scammony roots, on alkaline hydrolysis, gave a glycosidic acid, scammonic acid A, together with isobutyric, 2 S-methylbutyric and tiglic acids. In addition, two kinds of resin glycosides, named scammonin I and II, were isolated and characterized, respectively, as (11 S)-hydroxyhexadecanoic acid, 11-{[ O-6-deoxy-4- O-(2( E)-methyl-1-oxo-2-butenyl)-β- d-glucopyranosyl-(1 → 4)- O-6-deoxy-2- O-(2-methyl-1-oxobutyl)-α- l-mannopyranosyl-(1 → 2)- O-β- d-glucopyranosyl-(1 → 2)-6-deoxy-β- d-glucopyranosyl]oxy}-, intramol. 1,3‴-ester and (11 S)-hydroxyhexadecanoic acid, 11-{[ O-β- d-glucopyranosyl-(1 → 4)- O-6-deoxy-2- O-(2-methyl-1-oxobutyl)-α- l-mannopyranosyl-(1 → 2)- O-β- d- d-glucopyranosyl-(1 → 2)-6-deoxy-β- d-glucopyranosyl]oxy}-, intramol. 1,3‴-ester.
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