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