Using O=C1c2ccccc2C(=O)N1CCCBr, CN1CC[C@]23c4c5ccc(O)c4O[C@H]2[C@@H](O)C=C[C@H]3[C@H]1C5 to produce CN1CC[C@]23c4c5ccc(OCCCN6C(=O)c7ccccc7C6=O)c4O[C@H]2[C@@H](O)C=C[C@H]3[C@H]1C5, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.