Vicianose

Vicianose is a disaccharide.
Vicianin is a cyanogenic glycoside containing vicianose. The enzyme vicianin beta-glucosidase uses ("R")-vicianin and water to produce mandelonitrile and vicianose.
The fruits of "Viburnum dentatum" appear blue. One of the major pigments is cyanidin 3-vicianoside, but the total mixture is very complex.