A colouring agent belonging to the anthocyanin group of flavonoids and found in red to blue or black grapes, of which there are several derivatives. The malvidin diglucoside (exact chemical name is malvidin-3,5-diglucoside) is only found in grape varieties of the American species Vitis labrusca. This makes it possible to identify a wine unambiguously, even in a cuvée. The malvidin glucoside (especially the derivative malvidin-3-glucoside) is found in the European species Vitis vinifera.
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Andreas Essl
Autor, Modena