This molecule consists of two ring systems connected by a linking carbonyl group. One ring is a benzene ring that bears a tert-butyl group (-C(CH3)3) at the position para to the carbonyl attachment. The carbonyl carbon is also bonded to a negatively charged nitrogen, which is in turn attached to a six-membered pyridinium ring via its nitrogen. The pyridinium ring is an aromatic six-membered ring containing one positively charged nitrogen and no other substituents. No stereocenters are present.