InChI=1S/C20H28O7S/c1-7-11(5)20(22)26-15-9-14(10(3)4)17-13(8-2)18(21)19(16(17)12(15)6)27-28(23,24)25/h7-8,10,14-17,19H,6,9H2,1-5H3,(H,23,24,25)/b11-7-,13-8-