Using O=P([O-])([O-])O, CCOC(=O)CCN1C(=O)c2ccc(CBr)cc2C1=O to produce CCOC(=O)CCN1C(=O)c2ccc(C=O)cc2C1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.