12 monofluorocyclooctyne units grafted onto their surface allowed the design of deoxynojirimycin clusters by copper-freeclick-chemistry ligation. The dendrimers proved to be potent β-glucocerebrosidase inhibitors and behave as pharmacological chaperones in Gaucher disease cells. These dendrimers functionalized by monofluorocyclooctynes units may find numerous applications to prepare multivalent objects for biological