for the following products
(S)-(+)-5-(Hydroxymethyl)-2-pyrrolidinone p-tolu | (S)-5-(Hydroxymethyl)-2-pyrrolidinone p-toluenesulfonate | [(2S)-5-Oxopyrrolidin-2-yl]methyl 4-methylbenzene-1-sulfonate and (S)-(+)-5(Hydroxymethyl)-2-pyrrolidinone p-toluenesulfonate
