Using O=C(OC(=O)C(F)(F)F)C(F)(F)F, CC1=NNc2ccncc2N1 to produce CC1=NN(C(=O)C(F)(F)F)c2ccncc2N1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.