InChI=1S/C16H16O8S/c1-22-10-3-5-11(14(18)7-10)13-8-23-15-6-9(17)2-4-12(15)16(13)24-25(19,20)21/h2-7,13,16-18H,8H2,1H3,(H,19,20,21)