Using CCOC(=O)c1cnc2cc(N3CCN(C(=O)OC(C)(C)C)CC3)ccc2c1 to produce CC(C)(C)OC(=O)N1CCN(c2ccc3cc(C(=O)O)cnc3c2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.