InChI=1S/C34H38N4O4/c1-5-23(2)29-33(40)35-21-20-24-16-18-27(19-17-24)42-31(26-14-10-7-11-15-26)30(34(41)36-29)37-32(39)28(38(3)4)22-25-12-8-6-9-13-25/h6-21,28-31H,2,5,22H2,1,3-4H3,(H,35,40)(H,36,41)(H,37,39)/b21-20-