InChI=1/C20H26N4O4/c1-2-3-8-18-21-19(28-22-18)13-23-9-11-24(12-10-23)20(25)17-14-26-15-6-4-5-7-16(15)27-17/h4-7,17H,2-3,8-14H2,1H3/t17-/m1/s1 897E0168AB3E784D