Using CSCCCNC(=O)[C@H](Cc1ccccc1)N(C)C(=O)OC(C)(C)C, CC(C)(C)OC(=O)NCC(=O)O to produce CSCCCNC(=O)[C@H](Cc1ccccc1)N(C)C(=O)CNC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.