Using Nc1ccc(-c2cnccn2)cn1, O=C(O)Cc1ccc(-c2ccnc(F)c2)c(F)c1 to produce O=C(Cc1ccc(-c2ccnc(F)c2)c(F)c1)Nc1ccc(-c2cnccn2)cn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.