1,2-benzisothiazol-3(2H)-one, 2-(1-oxo-2-propenyl)- 2-acryloyl-1,2-benzisothiazol-3(2H)-one InChI=1/C10H7NO2S/c1-2-9(12)11-10(13)7-5-3-4-6-8(7)14-11/h2-6H,1H