InChI=1S/C25H34N4O4/c1-16(2)14-18-24(32)28-12-6-11-21(28)23(31)27-19(15-17-8-4-3-5-9-17)25(33)29-13-7-10-20(29)22(30)26-18/h3-5,8-9,16,18-21H,6-7,10-15H2,1-2H3,(H,26,30)(H,27,31)/t18-,19-,20-,21-/m0/s1