Using COCCc1noc(C2CC(c3ccc(CC(F)F)cc3)CN(C(C)=O)C2)n1 to produce COCCc1noc(C2CNCC(c3ccc(CC(F)F)cc3)C2)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.