Using O=C(c1ccccc1)c1cc2ccncc2[nH]1, CN(CCON)C(=O)OC(C)(C)C to produce CN(CCON=C(c1ccccc1)c1cc2ccncc2[nH]1)C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.