InChI=1S/C21H22O7S/c1-21(2)13-12-17-19(27-21)11-7-15(20(17)26-3)6-10-18(22)14-4-8-16(9-5-14)28-29(23,24)25/h4-5,7-9,11-13H,6,10H2,1-3H3,(H,23,24,25)