InChI=1/C17H20N2O2/c20-16-13-7-3-6-11-8-9-19(14(10-18-16)15(11)13)17(21)12-4-1-2-5-12/h3,6-7,12,14H,1-2,4-5,8-10H2,(H,18,20)/t14-/m1/s1/f/h18H C21169084EDADDCA