Using CCCCCN1C(=O)C(C)(C)c2cc3[nH]c(N)nc3cc21, CO to produce CCCCCN1C(=O)C(C)(C)c2cc3[nH]c(NC)nc3cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.