InChI=1/C20H20N2O/c21-11-10-14-8-9-18-17(13-14)20-16(7-4-12-23-20)19(22-18)15-5-2-1-3-6-15/h1-3,5-6,8-9,13,16,19-20,22H,4,7,10,12H2/t16-,19-,20-/m0/s1 DDB17944C32959FA