Using COc1nc(C(=O)OC(C)(C)C)c(OCc2ccccc2)c(=O)[nH]1 to produce COc1nc(C(=O)O)c(OCc2ccccc2)c(=O)[nH]1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.