Using O=C(O)COCCOc1ccc2nc(-c3ccccc3)n(-c3ccccc3)c2c1, O=C([O-])[O-] to produce COC(=O)COCCOc1ccc2nc(-c3ccccc3)n(-c3ccccc3)c2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.