120256-73-7 2-Pyrrolidinone, 3-hydroxy-5-(1-methylethoxy)-1-(phenylsulfonyl)-, trans- trans-1-Benzenesulfonyl-2-oxo-3-hydroxy-5-isopropyloxypyrrolidine trans-3-Hydroxy-5-(1-methylethoxy)-1-(phenylsulfonyl)-2-pyrrolidinone