IRIDOID GLYCOSIDES OF Verbascum laxum

Article abstract of DOI:10.1007/BF00602462

The epigeal part of Verbascum laxum Filar. et Jav. has yielded in addition to the known sinuatol, a new iridoid glycoside - 6-O-(3''-O-p-coumaroyl-α-L-rhamnopyranosyl)aucubin (I), <α>_D²⁰ -174.2 +/- 0.7 deg (c 1.4; MeOH).From the roots of the plant, as the main components giving an iridoid reaction, have been isolated harpagoside and the new iridoid glycoside 6-O-(2'',3''-di-O-acyl-α-L-rhamnopyranosyl)aucubin (V) <α>_D¹⁶ -130 +/- 2 deg (c 0.5; MeOH).The structures of the substances isolated were established with the aid of UV, IR, NMR, and mass spectra.