Using CCOC(=O)c1nc(-c2ccccc2)sc1CN1CCN(C(=O)OC(C)(C)C)CC1 to produce CC(C)(C)OC(=O)N1CCN(Cc2sc(-c3ccccc3)nc2C(=O)O)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.