InChI=1S/C19H14O8/c20-13-8-14(11-4-2-1-3-5-11)27-16-7-12(25-9-17(21)22)6-15(19(13)16)26-10-18(23)24/h1-8H,9-10H2,(H,21,22)(H,23,24)