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