Using COc1c(C(=O)CNC(C)(C)Cc2ccccc2)ccc(O)c1O to produce COc1c(C(O)CNC(C)(C)Cc2ccccc2)ccc(O)c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.