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