Wikipedia
Iptycene
An iptycene is an aromatic compound composed of varying number of arene subunits bound to bicyclo-octatriene brighead system. The first and simplest iptycene molecule is, triptycene, its first derivative was synthesized in 1931 by E. Clar. Bartlett et al. developed Clar's method and made the first triptycene. P.D.Bartlett , M.J.Ryan, and S.G.Cohen, J.Amer . Chem.Soc, 64 , 2649(1942)