Nine new iridoid glucosides, all characterized by a β-D-glucopyranosyl moiety linked to the C-11 oxymethylene and either a 3-methylbutyroyl (isovaleroyl) or a 2-methylbutyroyl group at position 1, have been isolated from leaves and branches of Viburnum ayavacense, together with three related known compounds. The nine new structures (namely 7,10,2',3' tetra- acetylsuspensolide F, 7,10,2',3' tetra-acetylisosuspensolide F, 7,10,2',6' tetra-acetylisosuspensolide F, 2',3' diacetylvalerosidate, 2',3' diacetylisovalerosidate, isoviburtinoside II, isoviburtinoside III, isosuspensolide E and isosuspensolide F) have been elucidated by spectroscopic means.
Iridoid glucosides from Viburnum ayavacense / Tomassini, Lamberto; Foddai, Sebastiano; Nicoletti, Marcello; M., Francesca Cometa; Giovanna, Palazzino; Corrado, Galeffi. - In: PHYTOCHEMISTRY. - ISSN 0031-9422. - 46:5(1997), pp. 901-905. [10.1016/s0031-9422(97)00379-8]
Iridoid glucosides from Viburnum ayavacense
TOMASSINI, Lamberto;FODDAI, Sebastiano;NICOLETTI, Marcello;
1997
Abstract
Nine new iridoid glucosides, all characterized by a β-D-glucopyranosyl moiety linked to the C-11 oxymethylene and either a 3-methylbutyroyl (isovaleroyl) or a 2-methylbutyroyl group at position 1, have been isolated from leaves and branches of Viburnum ayavacense, together with three related known compounds. The nine new structures (namely 7,10,2',3' tetra- acetylsuspensolide F, 7,10,2',3' tetra-acetylisosuspensolide F, 7,10,2',6' tetra-acetylisosuspensolide F, 2',3' diacetylvalerosidate, 2',3' diacetylisovalerosidate, isoviburtinoside II, isoviburtinoside III, isosuspensolide E and isosuspensolide F) have been elucidated by spectroscopic means.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
