Using CC(C)(C)OC(=O)N[C@@H](C(=O)O)C(C)(C)SC(c1ccccc1)(c1ccccc1)c1ccccc1, O=C([O-])O to produce COC(=O)[C@H](NC(=O)OC(C)(C)C)C(C)(C)SC(c1ccccc1)(c1ccccc1)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.