Using O=Cc1coc2c(Br)cccc12, CC(C)(C)OC(=O)N1CCNCC1 to produce CC(C)(C)OC(=O)N1CCN(Cc2coc3c(Br)cccc23)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.