Using COC(=O)c1cc(Cl)cc(OCCN(C(=O)OC(C)(C)C)c2ccncc2)c1 to produce CC(C)(C)OC(=O)N(CCOc1cc(Cl)cc(C(=O)O)c1)c1ccncc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.