InChI=1S/C15H12O10S/c16-7-2-1-6(3-12(7)25-26(21,22)23)11-5-9(18)13-8(17)4-10(19)14(20)15(13)24-11/h1-4,11,16-17,19-20H,5H2,(H,21,22,23)