3-oxazolidinepropanoic acid, 2-(1,1-dimethylethyl)-4-(methoxycarbonyl)-beta-oxo-, ethyl ester, (2S,4S)- InChI=1/C14H23NO6/c1-6-20-11(17)7-10(16)15-9(12(18)19-5)8-21-13(15)14(2,3)4/h9,13H,6-8H2,1-5H3/t9-,13-/m0/s methyl rel-(2R,4R)-2-tert-butyl-3-(3-ethoxy-3-oxopropanoyl)-1,3-oxazolidine-4-carboxylate