Using O=C(O)c1ccccc1, C=CCN(CC=C)c1nc(N)n2oc(=O)nc2n1 to produce C=CCN(CC=C)c1nc(NC(=O)c2ccccc2)n2oc(=O)nc2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.