InChI=1S/C21H24O9S/c1-5-7-11-9-15(23)28-20-16(11)18(24)12-10-14(30-31(25,26)27)21(3,4)29-19(12)17(20)13(22)8-6-2/h5,9,14,24H,1,6-8,10H2,2-4H3,(H,25,26,27)