InChI=1/C19H16N2O3/c22-18(17-10-9-14-3-1-2-4-16(14)11-17)20-12-13-5-7-15(8-6-13)19(23)21-24/h1-11,24H,12H2,(H,20,22)(H,21,23)/f/h20-21H 00F71C6CC7D4B99A