Using COC(=O)c1cccc(CN2CCC(Nc3ncnc4sc(Cl)cc34)CC2)c1 to produce O=C(O)c1cccc(CN2CCC(Nc3ncnc4sc(Cl)cc34)CC2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.