Using COC(=O)c1ccc(CBr)s1, O=C(NCC1CC1)Nc1ccc(C(=O)N2CCNCC2)cc1 to produce COC(=O)c1ccc(CN2CCN(C(=O)c3ccc(NC(=O)NCC4CC4)cc3)CC2)s1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.