InChI=1/C20H22N2O2/c1-14-6-7-17-16(13-14)19(2,3)20(10-8-15-5-4-12-24-15)21-18(23)9-11-22(17)20/h4-8,10,12-13H,9,11H2,1-3H3,(H,21,23)/b10-8+/t20-/m1/s1/f/h21H 73C3C500D8E11870