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