Two new iridoid glucosides from Verbascum salviifolium Boiss.

From the aerial parts of the plant Verbascum salviifolium, two new iridoid glucosides, 6-O-ß-D-glucopyranosylcatalpol (1) and 6-O-(6¨-O-trans-p- hydroxycinnamoyl)-ß-D-glucopyranosylaucubin (2) along with five known iridoid glycosides, 6-O-ß-D-glucopyranosylaucubin (3), 6-O-?-L- rhamnopyranosylcatalpol (4), verbaspinoside [= 6-O-(2¨-O-trans-cinnamoyl)- ?-L-rnamnopyranosylcatalpol] (5), pulverulentoside I [= 6-O-(2¨-O-trans-p-methoxycinnamoyl-3¨-O-acetyl)-?-L- rhamnopyranosylcatalpol] (6), and buddlejoside A8 [= 6-O-(4¨-O-trans-3,4-dimethoxycinnamoyl)-?-L-rhamnopyranosylcatalpol] (7) were isolated. The structures of the new compounds were established on the basis of spectroscopic evidence.U.S. Department of Agriculture American Radium Society 58-6408-7-012The authors are thankful to Prof. Dr. Hayri Duman (Gazi University, Faculty of Science, Etiler, Ankara, Turkey) for the authentification of the plant specimen. This work was supported in part by the United States Department of Agriculture, ARS Specific Cooperative Research Agreement no. 58-6408-7-012. -