Using Cn1cc(-c2cccc(C(=O)O)c2)c(=O)c(-n2cccn2)c1, CO to produce COC(=O)c1cccc(-c2cn(C)cc(-n3cccn3)c2=O)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.