Using CCCN(c1ccncc1)n1cc(C)c2cc(O)ccc21, CN=C=O to produce CCCN(c1ccncc1)n1cc(C)c2cc(OC(=O)NC)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.