Using CCOC(=O)c1cn(-c2cccc(-c3c(F)ccnc3F)c2)cn1 to produce O=C(O)c1cn(-c2cccc(-c3c(F)ccnc3F)c2)cn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.