InChI=1S/C21H30O7S/c1-7-12(5)9-17(22)27-16-10-15(11(3)4)19-14(8-2)20(23)21(18(19)13(16)6)28-29(24,25)26/h8-9,11,15-16,18-19,21H,6-7,10H2,1-5H3,(H,24,25,26)/b12-9+,14-8-