InChI=1S/C13H14O9S/c1-13(2)5-9(15)6-3-7(8(14)4-10(6)21-13)11(12(16)17)22-23(18,19)20/h3-4,11,14H,5H2,1-2H3,(H,16,17)(H,18,19,20)