Using Nc1c(-c2cc(Cl)c3c(c2)OCO3)c(C(F)(F)F)nn1-c1ncccn1, CCS(=O)CC to produce CCS(CC)=Nc1c(-c2cc(Cl)c3c(c2)OCO3)c(C(F)(F)F)nn1-c1ncccn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.