InChI=1S/C20H26O12S/c1-2-3-8-30-19(25)20(26)10-14(22)18(24)16(11-20)31-17(23)7-5-12-4-6-13(21)15(9-12)32-33(27,28)29/h4-7,9,14,16,18,21-22,24,26H,2-3,8,10-11H2,1H3,(H,27,28,29)/b7-5-