InChI=1/C17H22N2O4/c1-12(2)15-14(10-13-6-4-3-5-7-13)19(11-23-9-8-20)17(22)18-16(15)21/h3-7,12,20H,8-11H2,1-2H3,(H,18,21,22)/f/h18H 7B47D21C597B8C33