Using CCCCNC(=O)[C@H](C)C[C@H](O)[C@H](CC1(CC(=O)N2CC(C(=O)NC)Cc3ccccc32)CC1)NC(=O)OC(C)(C)C to produce CCCCNC(=O)[C@H](C)C[C@H](O)[C@@H](N)CC1(CC(=O)N2CC(C(=O)NC)Cc3ccccc32)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.