Using COC(=O)c1ccc2c(c1)nc(NCCc1ccncc1)c1nnc(OC)n12 to produce O=C(O)c1ccc2c(c1)nc(NCCc1ccncc1)c1n[nH]c(=O)n12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.