InChI=1S/C16H16O10S/c1-16(19)15(26-27(20,21)22)14(18)12-10(25-16)5-7-4-8(23-2)6-9(24-3)11(7)13(12)17/h4-6,15,17,19H,1-3H3,(H,20,21,22)