Using COC(=O)C1CN(C(=O)c2cc(OC)c(OC)c(OC)c2)CCN1C(=O)OC(C)(C)C to produce COc1cc(C(=O)N2CCN(C(=O)OC(C)(C)C)C(C(=O)O)C2)cc(OC)c1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.