Using CCOC(=O)[C@@H]1CCCN(CCBr)C1, ON=C1CC(c2ccccc2)c2ccccc21 to produce CCOC(=O)[C@@H]1CCCN(CCON=C2CC(c3ccccc3)c3ccccc32)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.