InChI=1/C27H20N2O2/c30-26(28-23-15-7-4-12-20(23)19-10-2-1-3-11-19)18-29-24-16-8-5-13-21(24)27(31)22-14-6-9-17-25(22)29/h1-17H,18H2,(H,28,30)/f/h28H F17DB4545376E5F4