InChI=1S/C16H18O9S/c1-2-3-7-4-5-8(26-7)6-9(14(20)21)24-16-12(19)10(17)11(18)13(25-16)15(22)23/h4-5,9-13,16-19H,6H2,1H3,(H,20,21)(H,22,23)