Acylated anthocyanins from leaves of Oxalis triangularis

Torgils Fossen; Saleh Rayyan; Maya H Holmberg; Håvard S Nateland; Øyvind M Andersen

doi:10.1016/j.phytochem.2005.04.009

Acylated anthocyanins from leaves of Oxalis triangularis

Phytochemistry. 2005 May;66(10):1133-40. doi: 10.1016/j.phytochem.2005.04.009.

Authors

Torgils Fossen¹, Saleh Rayyan, Maya H Holmberg, Håvard S Nateland, Øyvind M Andersen

Affiliation

¹ Department of Chemistry, University of Bergen, Norway. Torgils.Fossen@kj.uib.no

PMID: 15921712
DOI: 10.1016/j.phytochem.2005.04.009

Abstract

The novel anthocyanins, malvidin 3-O-(6-O-(4-O-malonyl-alpha-rhamnopyranosyl)-beta-glucopyranoside)-5-O-beta-glucopyranoside (2), malvidin 3-O-(6-O-alpha-rhamnopyranosyl-beta-glucopyranoside)-5-O-(6-O-malonyl-beta-glucopyranoside) (3), malvidin 3-O-(6-O-(4-O-malonyl-alpha-rhamnopyranosyl)-beta-glucopyranoside)-5-O-(6-O-malonyl-beta-glucopyranoside) (4), malvidin 3-O-(6-O-(4-O-malonyl-alpha-rhamnopyranosyl)-beta-glucopyranoside) (5) and malvidin 3-O-(6-O-(Z)-p-coumaroyl-beta-glucopyranoside)-5-O-beta-glucopyranoside (6), in addition to the 3-O-(6-O-alpha-rhamnopyranosyl-beta-glucopyranoside)-5-O-beta-glucopyranoside (1) and the 3-O-(6-O-(E)-p-coumaroyl-beta-glucopyranoside)-5-O-beta-glucopyranoside (7) of malvidin have been isolated from purple leaves of Oxalis triangularis A. St.-Hil. In pigments 2, 4 and 5 a malonyl unit is linked to the rhamnose 4-position, which has not been reported previously for any anthocyanin before. The identifications were mainly based on 2D NMR spectroscopy and electrospray MS.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Anthocyanins / chemistry*
Magnoliopsida / chemistry*
Molecular Structure
Plant Leaves / chemistry*

Substances

Anthocyanins