Using O=C(Cc1ccc(Cl)s1)N1C(=O)OC[C@H]1Cc1ccccc1, COCN(C(=O)OC(C)(C)C)C(C)C to produce CC(C)N(C[C@@H](C(=O)N1C(=O)OC[C@H]1Cc1ccccc1)c1ccc(Cl)s1)C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.