Using CCOCCl, Cn1nc(C(F)(F)F)c(C(O)=C(C#N)c2coc(C(C)(C)C)n2)c1Cl to produce CCOCOC(=C(C#N)c1coc(C(C)(C)C)n1)c1c(C(F)(F)F)nn(C)c1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.