N,N'-Hexamethylenebis(4-hydroxybutanamide)

N,N'-hexane-1,6-diylbis(4-hydroxybutyramide)

N,N'-(1,6-Hexanediyl)bis(4-hydroxybutanamide)

N,N'-(Hexane-1,6-diyl)bis(4-hydroxybutanamide)