Using COC(=O)c1cn2c(n1)-c1cc(Br)c(F)cc1C1CC2C1 to produce O=C(O)c1cn2c(n1)-c1cc(Br)c(F)cc1C1CC2C1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.