InChI=1/C21H18N2O2/c1-15-9-11-17(12-10-15)21(24)23-19(20-8-5-13-25-20)14-18(22-23)16-6-3-2-4-7-16/h2-13,19H,14H2,1H3/t19-/m1/s1 0A5EE4A81163F8BE