Previous acyclic CB[n]-type receptors contain a central glycoluril oligomer (monomer, dimer, and tetramer) with aromatic triptycene sidewalls, just like TrimerTrip. These clip-like receptors retain the essential molecular recognition properties of macrocyclic CB[n] . The monomer , dimer , and tetramer clips are able to encapsulate typical hydrophobic cationic guests which also bind to macrocyclic CB[n]s. In addition, the dimer and tetramer display similar host-guest properties .