1. A benzene ring bearing two methyl groups in a para relationship (1,4-dimethylbenzene).
2. At the same ring carbon that is ortho to one of the methyl groups, there is a carboxamide (-C(=O)-N-) substitutent.
3. The amide nitrogen is part of a piperazine ring, which is a six-membered ring containing two nitrogens at opposite positions.
4. The second nitrogen of the piperazine ring is bonded to a -CH2- linker, which connects to a protonated six-membered aromatic ring containing one nitrogen, known as a pyridinium ring. Pyridinium is the protonated form of pyridine, a six-membered nitrogen-containing aromatic ring, making it positively charged. The -CH2- linker is attached to the carbon at the para position relative to the nitrogen in the pyridinium ring.
5. There are no chiral centers or E/Z double bonds.
