Using O[C@H]1C[C@@H](c2nc3ccc(Br)cc3s2)C1, OCC1CCNCC1 to produce OCC1CCN([C@H]2C[C@H](c3nc4ccc(Br)cc4s3)C2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.