Using COC(=O)c1cc(S(C)(=O)=O)cc2c(C(C)C)cn(C)c12 to produce CC(C)c1cn(C)c2c(C(=O)O)cc(S(C)(=O)=O)cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.