Using COC(=O)c1ccc(-c2ccc3c(c2)CN(C(=O)OC(C)(C)C)CCO3)cc1 to produce CC(C)(C)OC(=O)N1CCOc2ccc(-c3ccc(C(=O)O)cc3)cc2C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.