Using C[C@@H](NC(=O)[C@@H](N)C(C)(C)C)c1ccccc1, C=CC[C@@H](C(=O)O)[C@@H]1OC(C)(C)OC1=O to produce C=CC[C@@H](C(=O)N[C@H](C(=O)N[C@H](C)c1ccccc1)C(C)(C)C)[C@@H]1OC(C)(C)OC1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.