InChI=1S/C18H14O9S/c1-25-18-11(3-5-16-12(18)6-7-26-16)15(21)9-14(20)10-2-4-13(19)17(8-10)27-28(22,23)24/h2-8,19H,9H2,1H3,(H,22,23,24)