Using O=C(NCc1cccnc1)c1ccc(Cl)nc1Cl, NCCc1cccc(F)c1 to produce O=C(NCc1cccnc1)c1ccc(Cl)nc1NCCc1cccc(F)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.