2(R)-butyric acid-2-hydroxy-3-[4-(3-oxo-morpholin-4-yl)phenylamino]propyl ester

butyric acid-5(R)-2-oxo-3-[4-(3-oxo-morpholin-4-yl)-phenyl]oxazolidin-5-yl-methyl ester

(R)-(2-oxo-3-(4-(3-oxo-morpholino)phenyl)oxazolidin-5-yl)methyl 4-methylbenzene sulfonate