Using COC(=O)CCN1CCN(CC2CN(C3CCN(C(=O)OC(C)(C)C)CC3)C(=O)O2)CC1 to produce CC(C)(C)OC(=O)N1CCC(N2CC(CN3CCN(CCC(=O)O)CC3)OC2=O)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.