Using CCOC(=O)C1C[C@H](CCc2ccc(Br)cc2)CNC1=O, C[O+](C)C to produce CCOC(=O)C1C[C@H](CCc2ccc(Br)cc2)CN=C1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.