3-oxazolidinecarboxylic acid, 4-[5-(acetyloxy)-3,4-dihydro-4-oxo-2H-pyran-2-yl]-2,2-dimethyl-, 1,1-dimethylethyl ester InChI=1/C17H25NO7/c1-10(19)24-14-9-22-13(7-12(14)20)11-8-23-17(5,6)18(11)15(21)25-16(2,3)4/h9,11,13H,7-8H2,1-6H tert-butyl 4-[5-(acetyloxy)-4-oxo-3,4-dihydro-2H-pyran-2-yl]-2,2-dimethyl-1,3-oxazolidine-3-carboxylate