InChI=1S/C17H18O10S/c1-17(8-18,16(22)15-11(20)6-10(19)7-12(15)21)9-3-4-13(26-2)14(5-9)27-28(23,24)25/h3-7,18-21H,8H2,1-2H3,(H,23,24,25)