Using O=C([O-])[O-], C[C@H]1COCCN1c1nc(Cl)nc2[nH]cnc12 to produce C[C@H]1COCCN1c1nc(Cl)nc2c1ncn2C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.