Using COc1ccc(Cn2c(=O)n(C)c(=O)c3c(Nc4ccccc4)n[nH]c32)cc1 to produce Cn1c(=O)[nH]c2[nH]nc(Nc3ccccc3)c2c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.