Using O=C(O)c1nc2ccccc2[nH]1, CC(C)(C)c1ccccc1Oc1ncccc1N=C=O to produce CC(C)(C)c1ccccc1Oc1ncccc1NC(=O)c1nc2ccccc2[nH]1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.