Using O=C(Nc1ccc(Cl)c(Cl)c1)C1CCN(C[C@@H]2CCCNC2)CC1, CCBr to produce CCN1CCC[C@@H](CN2CCC(C(=O)Nc3ccc(Cl)c(Cl)c3)CC2)C1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.