Using COC(=O)c1ccc(C(=O)NCCNc2nsc3ccccc23)nc1 to produce O=C(O)c1ccc(C(=O)NCCNc2nsc3ccccc23)nc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.