Using O=Cc1ccc(O)cc1, COc1ccc(N2CC(COS(C)(=O)=O)CC2=O)cc1 to produce COc1ccc(N2CC(COc3ccc(C=O)cc3)CC2=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.