Using CC(C)(C)OC(=O)NC/C=C/B1OC(C)(C)C(C)(C)O1, O=c1[nH]nc2c3cc(Cl)ccc3c(Br)cn12 to produce CC(C)(C)OC(=O)NC/C=C/c1cn2c(=O)[nH]nc2c2cc(Cl)ccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.