Using NCC(=O)O, COC(=O)c1ncc2nc(-c3ccccc3)oc2c1O to produce O=C(O)CNC(=O)c1ncc2nc(-c3ccccc3)oc2c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.