InChI=1S/C15H20O8S/c1-10(6-13(17)18)4-5-15(19)11(9-23-24(20,21)22)7-12(16)8-14(15,2)3/h4-7,19H,8-9H2,1-3H3,(H,17,18)(H,20,21,22)/b5-4+,10-6+