Using CS(=O)CCn1c(=O)n(C(=O)N[C@H](C(N)=O)C(C)(C)C)c2ccccc21, O=C(OO)c1cccc(Cl)c1 to produce CC(C)(C)[C@H](NC(=O)n1c(=O)n(CCS(C)(=O)=O)c2ccccc21)C(N)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.