Using CC(C)(C)OC(=O)c1cc(Cl)c(F)cc1F, Oc1cnc(C2CC2)c(Cl)c1 to produce CC(C)(C)OC(=O)c1cc(Cl)c(Oc2cnc(C3CC3)c(Cl)c2)cc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.