Using COC(=O)C1=NN(c2ccc(F)cc2F)C(c2ccc(Br)s2)C1 to produce OCC1=NN(c2ccc(F)cc2F)C(c2ccc(Br)s2)C1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.