InChI=1S/C20H22O7S/c1-11-7-14-9-18(25-3)16(21)10-15(14)20(12(11)2)13-5-6-17(19(8-13)26-4)27-28(22,23)24/h5-6,8-10,12,20-21H,1,7H2,2-4H3,(H,22,23,24)