Using Cc1nc2ccc(Br)nc2n1Cc1ccc(N(C(=O)OC(C)(C)C)C(=O)OC(C)(C)C)cc1Cl to produce Cc1nc2ccc(Br)nc2n1Cc1ccc(NC(=O)OC(C)(C)C)cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.