Using CCc1nc2[nH]c(-c3ccc4c(cnn4C(C)=O)c3)cc(=O)n2n1 to produce CCc1nc2[nH]c(-c3ccc4[nH]ncc4c3)cc(=O)n2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.