3(5)-<(S)-2,3-O-isopropylidenedihydroxypropyl>pyrazole

3(5)-2,3-O-isopropylidene-(D-erythro-trihydroxypropyl)pyrazole

1-(2,4-dinitrophenyl)-3-<(S)-2,3-di-O-acetyldihydroxypropyl>pyrazole