Toluene-4-sulfonic acid (S)-2-methyl-1-((R)-2-oxo-oxazolidin-4-yl)-propyl ester

(3S,7aR)-7a-((S)-1-Hydroxy-2-methyl-propyl)-6-methyl-3-phenyl-1,7a-dihydro-pyrrolo[1,2-c]oxazol-5-one