7-hydroxy-8-(phenylsulfonyl)-3a,8b-dihydrofuro[3,2-b][1]benzofuran-2(3H)-one InChI=1/C16H12O6S/c17-10-6-7-11-14(15-12(21-11)8-13(18)22-15)16(10)23(19,20)9-4-2-1-3-5-9/h1-7,12,15,17H,8H furo[3,2-b]benzofuran-2(3H)-one, 3a,8b-dihydro-7-hydroxy-8-(phenylsulfonyl)-