InChI=1S/C20H30O7S/c1-2-3-6-10-17(27-28(24,25)26)13-14-18-16(12-15-19(18)21)9-7-4-5-8-11-20(22)23/h4,7,12-18H,2-3,5-6,8-11H2,1H3,(H,22,23)(H,24,25,26)/b7-4-,14-13+