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