Using CCCO, O=c1cc(C(F)(F)F)[nH]c(=O)n1-c1c(F)cc(Cl)c2nc(Cl)sc12 to produce CCCOc1nc2c(Cl)cc(F)c(-n3c(=O)cc(C(F)(F)F)[nH]c3=O)c2s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.