Using COCCBr, CS(=O)(=O)c1cccc(Nc2cc(-c3ccccc3O)ncn2)c1 to produce COCCOc1ccccc1-c1cc(Nc2cccc(S(C)(=O)=O)c2)ncn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.