InChI=1/C18H16N2O2/c21-17(12-5-2-1-3-6-12)15-11-20-10-9-19-18(22)14-8-4-7-13(15)16(14)20/h1-8,11,17,21H,9-10H2,(H,19,22)/t17-/m0/s1/f/h19H 611459F5C909C37D