Using O=C(Nc1ccc(Cl)c(Cl)c1)N1CCN(C(=O)C2CCCNC2)CC1, CCBr to produce CCN1CCCC(C(=O)N2CCN(C(=O)Nc3ccc(Cl)c(Cl)c3)CC2)C1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.