Using N#Cc1cnn(-c2nc(F)c(C(F)(F)F)cc2Cl)c1N, CO to produce COc1nc(-n2ncc(C#N)c2N)c(Cl)cc1C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.