Using COC(=O)CC1c2nccc(Cl)c2CCN1C(=O)CNC(=O)OC(C)(C)C to produce CC(C)(C)OC(=O)NCC(=O)N1CCc2c(Cl)ccnc2C1CC(=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.