In the case of Ru(II)-arene tetrazene complexes as G (Figure ) , bearing glucose moieties on their periphery, the presence of the acyl-protecting groups on the carbohydrate increased cancer cells cytotoxicity. Complex H[81] (Figure ), containing a glucosyl functionalized 1,2,3-triazolylidene Nheterocyclic carbene ligand, showed medium anticancer activity but good selectivity and water solubility.