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It belongs to the family of hydrolases, specifically those glycosidases that hydrolyse O- and S-glycosyl compounds. The systematic name is (R)-vicianin β-D-glucohydrolase. It is also called vicianin hydrolase.
References
Kuroki G, Lizotte PA, Poulton JE (1984). "Catabolism of (R)-Amygdalin and (R)-Vicianin by Partially Purified β-Glycosidases from Prunus serotina Ehrh. and Davallia trichomanoides". Z. Naturforsch. C. 39: 232–239.