Aspergillus niger rutinosidase (AnRut) efficiently cleaved a library of rutin glycomimetics - isoquercitrin acylated at C-6′ of its glucosyl moiety. The substrates tested included isoquercitrin substituted at glucosyl C-6′ with acetyl, benzoyl, phenylacetyl, phenylpropanoyl, cinnamyl, vanillyl, galloyl, 4-hydroxybenzoyl, and 3-(4-hydroxy-3-O-methylphenyl)propanoyl. AnRut showed the ability to transglycosylate