InChI=1/C16H22N2O2/c19-16(20)14-6-4-13(5-7-14)11-17-8-2-10-18-9-1-3-15(18)12-17/h4-7,15H,1-3,8-12H2,(H,19,20)/t15-/m1/s1/f/h17H A53884874DA31599