InChI=1S/C28H34N4O4/c1-5-18(2)26(31-19(3)33)28(36)32(4)25(16-20-10-12-22(34)13-11-20)27(35)29-15-14-21-17-30-24-9-7-6-8-23(21)24/h6-15,17-18,25-26,30,34H,5,16H2,1-4H3,(H,29,35)(H,31,33)/b15-14+/t18-,25-,26-/m0/s1