InChI=1S/C21H22O8S/c1-21(2)17-7-6-13(19(26-3)14(17)8-9-28-21)16-11-27-18-10-12(22)4-5-15(18)20(16)29-30(23,24)25/h4-10,16,20,22H,11H2,1-3H3,(H,23,24,25)