InChI=1S/C21H24O9S/c1-6-20(2,3)14-8-12-7-13-9-17(28-15(13)10-16(12)29-19(14)23)21(4,5)30-18(22)11-27-31(24,25)26/h6-8,10,17H,1,9,11H2,2-5H3,(H,24,25,26)