InChI=1S/C16H14O10S/c1-25-16-12(19)7-10(17)13(15(16)21)14(20)11(18)6-8-3-2-4-9(5-8)26-27(22,23)24/h2-5,7,17,19,21H,6H2,1H3,(H,22,23,24)