Cyanidin 3-Oxalylglucoside in Orchids

Abstract

A new acylated anthocyanin has been isolated from flowers of Nigritella and Orchis and identified as cyanidin 3-O-β-(6”-O-oxalyl)-glucoside on the basis of TLC , HPLC , FABMS, 1H and 13C NMR . This pigment was found to be present in various members of the Orchidaceae.

Characterization of Anthocyanins and Pyranoanthocyanins from Blood Orange [Citrus sinensis (L.) Osbeck] Juice

“…Proton and Carbon NMR. 1 H and 13 C NMR spectra were recorded on a Bruker AMX 300 spectrometer (Bruker Biospin, Germany) at 300.13 and 75.49 MHz, respectively. Anthocyanins were dissolved in a mixture of methanol-d 4/TFA-d1 (19:1, v/v).…”

The anthocyanins

“…In Orchidaceae, the recent discovery of cyanidin 3-oxalylglucoside as a taxonomic marker for certain European species (see Table 1.8) is of considerable interest, but further surveys are needed to see how widespread this novel pigment is (Strack et al, 1986). Considering the enormous biological and popular interest in orchid flowers, it is surprising how little is known of the anthocyanins in the family and further studies are bound to be rewarding.…”

An Acylated Cyanidin 3,7-diglucoside in the Bluish Flowers of Bletilla striata ‘Murasaki Shikibu’ (Orchidaceae)

“…To the best of our knowledge, 41 acylated anthocyanins have been isolated and determined from various flowers of the plants in the Orchidaceae (Fossen and Øvstedal, 2003;Saito et al, 1994Saito et al, , 1995aStrack et al, 1986Strack et al, , 1989Tatsuzawa et al, 1994Tatsuzawa et al, , 1996aTatsuzawa et al, , b, 1997Tatsuzawa et al, , 1998Tatsuzawa et al, , 2004Tatsuzawa et al, , 2005Tatsuzawa et al, , 2006Williams et al, 2002). On the basis of these results, hydroxycinnamic acids of acylated anthocyanins were revealed to be responsible for the stabilization and bluing of the flower color.…”