Using CCOC(=O)c1ccc2[nH]cc(CCNC(=O)OC(C)(C)C)c2c1 to produce CC(C)(C)OC(=O)NCCc1c[nH]c2ccc(CO)cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.