Using Brc1ccccn1, CCOC(=O)c1cnc2c(C(F)(F)F)cccc2c1Cl to produce O=C(c1ccccn1)c1cnc2c(C(F)(F)F)cccc2c1Cl, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.