InChI=1S/C23H16O5/c24-12-15-9-13-5-1-3-7-16(13)18(21(15)25)11-19-17-8-4-2-6-14(17)10-20(22(19)26)23(27)28/h1-10,12,25-26H,11H2,(H,27,28)