InChI=1S/C19H20O15S/c20-4-11-15(27)19(34-35(30,31)32)17(29)18(33-11)13-10(25)3-9(24)12(16(13)28)14(26)5-1-7(22)8(23)2-6(5)21/h1-3,11,15,17-25,27-29H,4H2,(H,30,31,32)