Using COC(=O)c1c[nH]c2ncc(Br)nc12, CC(C)(C)C(=O)OCCl to produce COC(=O)c1cn(COC(=O)C(C)(C)C)c2ncc(Br)nc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.