Using CC(C)(C)N, CC(C)(C)OC(=O)N1CSCC1C(=O)O to produce CC(C)(C)NC(=O)[C@@H]1CSCN1C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.