octaazacubane

Etymology
. From.

Noun

 * 1) A theoretical  composed of eight (8)  atoms only, in a  configuration, with each nitrogen   being a  on the cube, and bonding to three other nitrogens at the nearest three other vertexes. This is theorized to be the  with the highest velocity, the most explosive non-nuclear explosive. It is an  of nitrogen, and an analogue of the organic molecule ; and an  of  (N8).

Usage notes
Though this is named as an, there are no atoms in the molecule, as all carbons are substituted with nitrogen, in an analog of the carbon cube  (C8H8), without the  atoms.