Using COC(=O)c1cc(N2CCC(CNC(=O)OC(C)(C)C)CC2)ncn1 to produce CC(C)(C)OC(=O)NCC1CCN(c2cc(C=O)ncn2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.