InChI=1S/C21H24O8S/c1-14(6-9-21(2,3)13-28-30(23,24)25)7-10-27-20-15-4-5-19(22)29-18(15)12-17-16(20)8-11-26-17/h4-5,7-8,11-12H,6,9-10,13H2,1-3H3,(H,23,24,25)/b14-7+