In enzymology, a vicianin beta-glucosidase () is an enzyme that catalyzes the chemical reaction (R)-vicianin + H2O mandelonitrile + vicianose Thus, the two substrates of this enzyme are (R)-vicianin and H2O, whereas its two products are mandelonitrile and vicianose. This enzyme belongs to the family of hydrolases, specifically those glycosidases that hydrolyse O- and S-glycosyl compounds. The systematic name of this enzyme class is (R)-vicianin beta-D-glucohydrolase. This enzyme is also called vicianin hydrolase. References EC 3.2.1 Enzymes of unknown structure