Using O=C(CBr)OCc1ccccc1, CCOC(=O)c1cc(O)n(-c2ccccc2)n1 to produce CCOC(=O)c1cc(OCC(=O)OCc2ccccc2)n(-c2ccccc2)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.