Using Cc1sc(C(=O)CCc2ccc(OCC(O)CN)cc2)c2c1CC(C)(C)CC2, O=C(O)CO to produce Cc1sc(C(=O)CCc2ccc(OCC(O)CNC(=O)CO)cc2)c2c1CC(C)(C)CC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.