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