Using N[C@@H](Cc1ccccc1)C(=O)C1C2CC3CC(C2)CC1(N)C3, CSCC[C@@H](NC(=O)[C@H](Cc1ccc(O)cc1)NC(=O)OC(C)(C)C)C(=O)NCC(=O)O to produce CSCC[C@@H](NC(=O)[C@H](Cc1ccc(O)cc1)NC(=O)OC(C)(C)C)C(=O)NCC(=O)N[C@@H](Cc1ccccc1)C(=O)C1C2CC3CC(C2)CC1(N)C3, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.