InChI=1S/C18H28O6S/c1-17(24-25(21,22)23)15-13-11-9-7-5-3-2-4-6-8-10-12-14-16-18(19)20/h5,7,9,11,17H,4,6,8,10,12-16H2,1H3,(H,19,20)(H,21,22,23)/b7-5-,11-9+