InChI=1S/C20H26O7S/c1-10(2)11-8-12-13(9-14(11)21)20(5)7-6-15(27-28(24,25)26)19(3,4)18(20)17(23)16(12)22/h8-10,15,18,21H,6-7H2,1-5H3,(H,24,25,26)