Using COC(=O)c1cccc(C2CCN(C(=O)OC(C)(C)C)CC2OCc2ccc3ccccc3c2)c1 to produce CC(C)(C)OC(=O)N1CCC(c2cccc(C(=O)O)c2)C(OCc2ccc3ccccc3c2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.