Using COC(=O)c1scc(C#N)c1N(C(=O)OC(C)(C)C)C(=O)OC(C)(C)C to produce CC(C)(C)OC(=O)N(C(=O)OC(C)(C)C)c1c(C#N)csc1C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.