Acylated Iridoid Glycosides from Verbascum lasianthum
Authors : Zeliha Ş. Akdemir, I. Irem Tatli
Pages : 101-110
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Publication Date : 9999-12-31
Article Type : Makaleler
Abstract :From the roots of Verbascum lasianthum Boiss. ex Bentham 4 catalpol derivatives, 6-O-(a-L-rhamnopyranosyl)-catalpol (1), verbascoside A [= 6-O-(4''-O-trans-p-methoxycinnamoyl)-a -L-rhamnopy- ranosylcatalpol] (2), pulverulentoside I [= 6-O-(3''-O-acetyl-2''-O-trans-p-methoxycinnamoyl)-a -L-rham-nopyranosylcatalpol] (3), and buddlejoside A5 [= 6-O-(2''-O-acetyl-3''-O-trans-p-methoxycinnamoyl)-a -L-rhamnopyranosylcatalpol] (4), as well as aucubin (5) and an aucubin derivative, unduloside III [= 6-O-(3''-O-trans-p-methoxycinnamoyl)- a-L-rhamnopyranosylaucubin] (6), were isolated and characterized. The structure elucidation of the compounds was established on the basis of spectroscopic evidence. Buddlejoside A5 (4) was found for the first time in the genus Verbascum.Keywords : Verbascum lasianthum Boiss. ex Bentham, Scrophulariaceae, iridoid glycosides, 6-O-(a-L-rhamnopyranosyl)-catalpol, verbascoside A, pulverulentoside I, buddlejoside A5, aucubin, unduloside III