Using O=C1CN(c2ccncc2)CCN1, COC(=O)COc1ccc(C(=O)CBr)cc1 to produce COC(=O)COc1ccc(C(=O)CN2CCN(c3ccncc3)CC2=O)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.