The main anthocyanins found in the purple-fleshed varieties of
potatoes studied were petunidin and malvidin.In the red-fleshed
potatoes, pelargonidin derivatives were the most abundant anthocyanin
(Table 2).In the tubers Blue Congo and Valfi, the presence of
anthocyanins such as petunidin-3-rutinoside-5-glucoside, petunidin-
3-feruloylrutinoside-5-glucoside and malvidin-3-feruloyrutinoside-
5-glucoside were detected.Additionally, differences in the
content of petunidin-3-caffeoylrutinoside-5-glucoside, petunidin-
2-p-coumaroylrutinoside-5-glucoside and malvidin-3-p-coumaroylrutinoside-
5-glucoside were found between the samples
of raw potatoes examined, and higher levels of those anthocyanins
were found in the Blue Congo variety of potato.