InChI=1S/C15H12O11S/c16-7-4-9(18)12(10(19)5-7)14(22)11(20)3-6-1-2-8(17)15(13(6)21)26-27(23,24)25/h1-2,4-5,16-19,21H,3H2,(H,23,24,25)