Using COC(=O)c1cccc(Sc2nc(Nc3cc(C4CC4)n[nH]3)c3ccccc3n2)c1 to produce O=C(O)c1cccc(Sc2nc(Nc3cc(C4CC4)n[nH]3)c3ccccc3n2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.