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