Using COC(=O)c1ccc(OCC(=O)N2CCN(CCC(C)(C)C)CC2)c(C)c1 to produce Cc1cc(C(=O)O)ccc1OCC(=O)N1CCN(CCC(C)(C)C)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.