InChI=1S/C20H20O8S/c1-11(2)3-8-14-15(21)9-16(22)19-17(23)10-18(27-20(14)19)12-4-6-13(7-5-12)28-29(24,25)26/h3-7,9,18,21-22H,8,10H2,1-2H3,(H,24,25,26)