InChI=1S/C23H26N2O4/c1-14-11-21(29-2)19(18-7-9-24-22(14)18)13-25-10-8-17(26)12-20(25)15-3-5-16(6-4-15)23(27)28/h3-7,9,11,17,20,24,26H,8,10,12-13H2,1-2H3,(H,27,28)/t17-,20-/m0/s1