InChI=1S/C17H22O6S/c1-14(7-6-8-15(2)13-23-24(19,20)21)11-12-22-17(18)16-9-4-3-5-10-16/h3-5,8-11H,6-7,12-13H2,1-2H3,(H,19,20,21)/b14-11-,15-8+