InChI=1S/C20H24O7S/c1-12-7-14-9-19(26-3)18(21)10-16(14)20(17(12)11-27-28(22,23)24)13-5-4-6-15(8-13)25-2/h4-6,8-10,12,17,20-21H,7,11H2,1-3H3,(H,22,23,24)