Using O=C([O-])[O-], COC(=O)c1c(O)c2cc(OC)ccc2n1-c1ccccc1 to produce COC(=O)c1c(OC)c2cc(OC)ccc2n1-c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.