Using COc1ccc(C(=O)O)c(Nc2cccc(CNC(=O)OC(C)(C)C)c2)n1 to produce COc1ccc(CO)c(Nc2cccc(CNC(=O)OC(C)(C)C)c2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.