InChI=1S/C19H14O7S/c20-14-7-5-11(9-16(14)26-27(23,24)25)13-6-4-10-2-1-3-12-8-15(21)19(22)18(13)17(10)12/h1-7,9,15,20-21H,8H2,(H,23,24,25)