InChI=1S/C21H36N4O4/c1-28-18-15-17(16-19(29-2)21(18)27)7-8-20(26)25(14-6-10-23)13-4-3-11-24-12-5-9-22/h7-8,15-16,24,27H,3-6,9-14,22-23H2,1-2H3/b8-7-