9'H-9,10'-biacridin-9'-one InChI=1/C26H16N2O/c29-26-19-11-3-7-15-23(19)28(24-16-8-4-12-20(24)26)25-17-9-1-5-13-21(17)27-22-14-6-2-10-18(22)25/h1-16 [9,10'(9'H)-biacridin]-9'-one