Using CCOC(CN)OCC, O=C(Nc1cnc(Cl)c(Br)c1)C(F)(F)F to produce FC(F)(F)c1nccn1-c1cnc(Cl)c(Br)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.