Crypthophilic Acids A, B, and C: Resin Glycosides from Aerial Parts of <i>Scrophularia crypthophila</i>
作者:İhsan Çalış、Yükselen Sezgin、Ali A. Dönmez、Peter Rüedi、Deniz Tasdemir
DOI:10.1021/np060511k
日期:2007.1.1
water-soluble part of the methanolic extract from the aerial parts of Scrophularia crypthophila, through chromatographic methods, yielded three new resin glycosides, crypthophilic acids A - C (1-3). Compounds 1-3 are tetraglycosides of (+)-3S,12S-dihydroxypalmitic acid. The structures of these and 10 known compounds were elucidated by spectroscopic and chemical means. All natural resin glycosides known so
extracted from the seeds of I. lacunosa are characterized. Alkaline hydrolysis of the crude resin glycoside fraction obtained from methanolic extract of the seeds yielded three organic acids, namely, 2S-methylbutyric, (E)-2-methylbut-2-enoic, and 2R-methyl-3R-hydroxybutyric acids, and a glycosidic acid fraction. Acidichydrolysis of the glycosidic acid fraction yielded hydroxyl fatty acid components