N‐Ethylazatribenzo‐21‐crown‐7

The structure of the title compound, 25‐ethyl‐2,5,12,15,22,28‐hexa­oxa‐25‐aza­tetra­cyclo­27.4.0.0^6,11.0^16,21]­tri­tria­conta‐1(29),6(11),7,9,16(21),17,19,30,32‐nona­ene, C₂₈H₃₃NO₆, does not exhibit a binding cavity for cations, but is collapsed in on itself. The conformation is unique among known tri­benzo‐21‐crown‐7 structures, and may be a result of intermolecular (C—H?π) and intramolecular (C—H?O) hydrogen bonding.