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