Using COC(=O)CC1CC(N(CCNC(=O)OC(C)(C)C)C(=O)OC(C)(C)C)C1 to produce CC(C)(C)OC(=O)NCCN(C(=O)OC(C)(C)C)C1CC(CC(=O)O)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.