InChI=1S/C16H12O10S/c1-24-12-5-11-13(16(20)15(12)19)14(18)8(6-25-11)7-2-3-9(17)10(4-7)26-27(21,22)23/h2-6,17,19-20H,1H3,(H,21,22,23)