Using Cn1c(-c2cncc(NS(=O)(=O)CCOCc3ccccc3)c2)cc2ccccc21 to produce Cn1c(-c2cncc(NS(=O)(=O)CCO)c2)cc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.