3,3-Dimethyl-5-[(methylsulfonyl)oxy]-2(3H)-benzofuranone

2,3-dihydro-3-3-dimethyl-2-oxo-5-benzofuranylmethanesulfonate

Methane sulfonic acid 3,3-dimethyl-2-oxo-2,3-dihydrobenzofuran-5-yl ester, 3,3-Dimethyl-2-oxo-2,3-dihydrobenzofurane-5-yl methane sulfonate