Using CCOCC, N#Cc1nn(-c2c(Cl)cc(C(F)(F)F)cc2Cl)cc1C1CC(=O)C1 to produce C=C1CC(c2cn(-c3c(Cl)cc(C(F)(F)F)cc3Cl)nc2C#N)C1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.