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