3,3',3'',3'''-[(2,4,8,10-Tetraoxaspiro[5.5]undecane-3,9-diyl)bis(1,3-propanediylnitrilo)]tetrakis[propionic acid hydrazide]

N,N'-(2,4,8,10-tetraoxaspiro[5.5]undecane-3,9-diyldipropane-1,3-diyl)bis[N-(3-hydrazino-3-oxopropyl)-beta-alaninohydrazide]