Number a benzene ring C1-C6 clockwise. Substituents on this ring:
- C1 and C2: each carbon bears a methyl group (-CH3).
- C4: bears a nitro group, (a nitrogen atom positively charged, double-bonded to one oxygen and single-bonded to a negatively charged oxygen; denoted as -[N+](-[O-])=O).
- C5: bonded to a secondary amino group (-NH-), which connects to an azetidine ring (a saturated four-membered heterocycle with three carbons and one nitrogen). The amino nitrogen attaches to the azetidine at the carbon para to the ring nitrogen.