InChI=1S/C17H24O6S/c1-2-3-4-5-6-7-8-11-15(18)12-9-10-13-16(17-14-22-17)23-24(19,20)21/h8,11,15-18H,2-7,14H2,1H3,(H,19,20,21)/b11-8+