Using O=C1NC(=O)C(c2c[nH]c3ccccc23)=C1c1cnc[nH]1 to produce O=C1NC(=O)c2c1c1c3ccccc3[nH]c1n1cncc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.