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