Using COC(=O)c1cnc(N2CCc3c([nH]c4ccccc34)C2)nc1 to produce O=C(O)c1cnc(N2CCc3c([nH]c4ccccc34)C2)nc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.