InChI=1S/C16H14O9S/c1-16(8-23-26(18,19)20)13(25-16)7-22-15-9-2-3-14(17)24-12(9)6-11-10(15)4-5-21-11/h2-6,13H,7-8H2,1H3,(H,18,19,20)