Using CCOC(=O)c1ccc(N2CCNCC2)cc1, O=CC1=C(Br)CCCC1 to produce CCOC(=O)c1ccc(N2CCN(CC3=C(Br)CCCC3)CC2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.