(3S,4S)-4-hydroxy-3-methylpyrrolidin-2-one 2-pyrrolidinone, 4-hydroxy-3-methyl-, (3S,4S)- InChI=1/C5H9NO2/c1-3-4(7)2-6-5(3)8/h3-4,7H,2H2,1H3,(H,6,8)/t3-,4+/m0/s