Using COC(=O)c1ccc(OCCBr)cc1, O=C1NC(=O)c2ccccc21 to produce COC(=O)c1ccc(OCCN2C(=O)c3ccccc3C2=O)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.