Using NC(=O)C[C@H](NC(=O)OCc1ccccc1)C(=O)N[C@@H](Cc1ccccc1)[C@H](O)C(=O)O, CC(C)(C)NC(=O)[C@@H]1[C@H](O[Si](C)(C)C(C)(C)C)CCN1C(=O)OC(C)(C)C to produce CC(C)(C)NC(=O)[C@@H]1[C@H](O)CCN1C(=O)[C@@H](O)[C@H](Cc1ccccc1)NC(=O)[C@H](CC(N)=O)NC(=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.