InChI=1S/C15H14O11S/c16-7(11-9(18)5-10(19)13(21)14(11)22)3-1-6-2-4-8(17)15(12(6)20)26-27(23,24)25/h2,4-5,17-22H,1,3H2,(H,23,24,25)