InChI=1S/C16H14O11S/c1-26-12-5-7(2-3-11(12)27-28(23,24)25)4-9(18)14(20)13-8(17)6-10(19)15(21)16(13)22/h2-3,5-6,17,19,21-22H,4H2,1H3,(H,23,24,25)