Anthocyanidins cyanidin

Anthocyanidins Cyanidin Blackberry, black currant, blueberry,... 

Figure 2.21 Structures of betanldln and a typical anthocyanidin, cyanidin, accumulating as various glycosylated structures and their acylated forms. Both compounds exhibit similar max values. Occurrence of these two classes of pigments mutually excludes each other. The betalains are exclusively found in most families of the plant order Caryophyllales, whereas the anthocyanins are ubiquitously distributed in the other families of the Angiosperms.

Meiers, S., Kemeny, M., Weyand, U., Gastpar, R., von Angerer, E., and Marko, D., The anthocyanidins cyanidin and delphinidin are potent inhibitors of the epidermal growth-factor receptor, J. Agric. Food Chem., 49, 958-962, 2001. 

The antioxidant activity of a compound depends upon which free radical or oxidant is used in the assay (Halliwell and Gutteridge, 1995), and a different order of antioxidant activity is therefore to be expected when analyses are performed using different methods. This has been demonstrated by Tsuda et al. (1994) in their study of antioxidative activity of an anthocyanin (cyanidin-3-O-p-D-glucosidc) and an anthocyanidin (cyanidin) in four different lipophilic assay systems. Both compounds had antioxidative activity in all four systems, but the relative activity between them and their activity, compared with Trolox, varied with the method used. Fukumoto and Mazza (2000) reported that antioxidant activity of compounds with similar structures gave the same trends, although not always the same results, when measured by P-carotene bleaching, DPPH and HPLC detection of malonaldehyde formation in linoleic acid emulsion. 

Anthocyanidins Cyanidin, delphinidin, malvidin, pelargonidin, peonidin, petunidin Red, blue, and purple berries red and purple grapes red wine... 

Anthocyanidins Cyanidin, delphinidin, malvidin, petunidin Grapes, cherries... 

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