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