Using CCOC(=O)c1ccc2c(c1)CCC2N1CCN(C(=O)OC(C)(C)C)CC1 to produce CC(C)(C)OC(=O)N1CCN(C2CCc3cc(C(=O)O)ccc32)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.