Using COC(=O)c1nccnc1CS(=O)(=O)Cc1c(F)ccc(Cl)c1Cl to produce O=S1(=O)Cc2nccnc2C(O)=C1c1c(F)ccc(Cl)c1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.