InChI=1S/C19H20O10S/c1-8-6-9-12(18(27-4)14(8)20)15(21)13-10(16(9)29-30(22,23)24)7-11(25-2)17(26-3)19(13)28-5/h6-7,16,20H,1-5H3,(H,22,23,24)