InChI=1S/C17H22O6S/c1-14(2)7-6-8-15(13-23-24(19,20)21)11-12-22-17(18)16-9-4-3-5-10-16/h3-5,7,9-11H,6,8,12-13H2,1-2H3,(H,19,20,21)/b15-11+