InChI=1/C21H19NO2/c23-19-14-8-7-13-18(19)15-22-20(16-9-3-1-4-10-16)21(24)17-11-5-2-6-12-17/h1-15,20-21,23-24H/p+1/b22-15+/t20-,21+/m1/s1/fC21H20NO2/h22H/q+1 C68AF72D8C1F1BF0