Using O=C(Cl)SCl, Cc1cc(C(N)=O)ccc1C(=O)OC(C)(C)C to produce Cc1cc(-c2nsc(=O)o2)ccc1C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.