Using COC(=O)c1ccc2c(Nc3ccc(OC(F)(F)F)cc3)ncnc2c1 to produce O=C(O)c1ccc2c(Nc3ccc(OC(F)(F)F)cc3)ncnc2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.