Using CC[C@H](C)CC(NC(=O)OC(C)(C)C)[C@](N)(C(=O)OC)[C@H](CSC)C(=O)C1NCCc2ccccc21 to produce CC[C@H](C)[C@H](N)CN[C@H](C(=O)OC)[C@H](CSC)C(=O)C1NCCc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.