1,3,6,7,9,11,14,15,17,19,22,23,25,27,30,34-Hexadecaazanonacyclo-[25.5.3.26,9.214,17.222,25.13,7.111,15.119,23.030,34]-tetratetracontane

1,1-Bis-(2-aminoethyl)hydrazine condenses with formaldehyde to a polymer that is isomerized to the nonacyclic title compound, showing increased conformational mobility and crystallizing as a tetrahydrate for which the X-ray analysis reveals channels formed by stacked rings and filled by chains of water molecules.