(4R)-4-ethyl-1,3-oxazolidin-2-one 2-oxazolidinone, 4-ethyl-, (4R)- InChI=1/C5H9NO2/c1-2-4-3-8-5(7)6-4/h4H,2-3H2,1H3,(H,6,7)/t4-/m1/s