InChI=1S/C19H14O11S/c20-15-12-7-6-11(8-14(12)28-9-13(15)10-4-2-1-3-5-10)29-16(18(21)22)17(19(23)24)30-31(25,26)27/h1-9,16-17H,(H,21,22)(H,23,24)(H,25,26,27)