Begin with a benzene ring, numbered 1 through 6 clockwise, carrying three substituents:
1. C1: a nitro group (-NO2).
2. C4: an iodine atom.
3. C3: a carbonyl substituent (-C(=O)-) bonded to the nitrogen of a pyrrolidine ring (a five-membered saturated ring with one nitrogen).
  - On this pyrrolidine, the meta position relative to the nitrogen carries a methylene group (-CH2-).
  - This methylene extends to a secondary amine (-NH-), which in turn is substituted with a methyl group (-CH3).