Using CCCCCC(=O)OC(NC(=O)OC(C)(C)C)[C@H](C)CCc1cccs1 to produce C[C@H](CCc1cccs1)C(O)NC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.