InChI=1S/C20H26N4O.C4H4O4/c1-4-24(5-2)20(25)22-14-10-16-15-7-6-8-17-19(15)13(11-21-17)9-18(16)23(3)12-14;5-3(6)1-2-4(7)8/h6-8,10-11,14,18,21H,4-5,9,12H2,1-3H3,(H,22,25);1-2H,(H,5,6)(H,7,8)/b;2-1-/t14-,18+;/m0./s1