Using CCOC(=O)[C@H](CNC(=O)CNC(=O)OCc1ccccc1)NS(=O)(=O)c1ccccc1 to produce CCOC(=O)[C@H](CNC(=O)CN)NS(=O)(=O)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.