The molecule is a pyridine ring (six-membered aromatic ring with one nitrogen) with two substituents:

- The ring carbon meta to the nitrogen carries a fluorine atom.
- The ring carbon between the nitrogen and the fluorine-bearing carbon is bonded to a side chain.

Side chain description:

1. A methylene (-CH2-) is attached directly to the ring (call this C1).  
2. C1 is bonded to a secondary carbon C2.  
3. C2 is bonded to three groups:
   a) the ring-methylene C1 (already noted),  
   b) a secondary amine (-NH-) that continues into a straight three-carbon chain  
   c) an isobutyl group (a three-carbon chain with a methyl branch on the penultimate carbon).