InChI=1S/C15H20O8S/c1-11(9-23-24(19,20)21)7-13(16)8-15(2,18)5-3-14(17)12-4-6-22-10-12/h4,6-7,10,18H,3,5,8-9H2,1-2H3,(H,19,20,21)/b11-7+