InChI=1S/C19H22O7S/c20-16-9-7-15(8-10-16)12-18(22)19(26-27(23,24)25)13-17(21)11-6-14-4-2-1-3-5-14/h1-5,7-10,18-20,22H,6,11-13H2,(H,23,24,25)