Using CCOC(=O)c1cnc(N2CCN(C(=O)OC(C)(C)C)CC2)s1 to produce CC(C)(C)OC(=O)N1CCN(c2ncc(C(=O)O)s2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.