Using O=C(C(Br)CC12CC(c3ccccc31)c1ccccc12)N(CCO)Cc1ccccc1 to produce O=C1C(CC23CC(c4ccccc42)c2ccccc23)OCCN1Cc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.