(S)-(−)-3-(4-Phenyl-1-piperazinyl)-1,2-propanediol N,N'-Dioxide

The piperazine ring of the title molecule, C 13 H 20 N 2 O 4 , assumes a chair conformation with the two N→O groups oriented trans-axially to each other. The O atoms of each molecule of the crystal are involved in an infinite three-dimensional O−H...O hydrogen-bond network, which is mainly responsible for the packing