Using CN, Cc1cccc(-c2nc(-c3cncc(-c4ccc(C=O)cc4)c3)c3cc[nH]c3n2)n1 to produce CNCc1ccc(-c2cncc(-c3nc(-c4cccc(C)n4)nc4[nH]ccc34)c2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.