The molecule contains two separate aromatic thiazole rings (each a five-membered ring with one sulfur and one nitrogen, counted S-1, C-2, N-3, C-4, C-5).

Ring A (the reference ring):
- Position 2 (the carbon between S-1 and N-3) carries a straight n-butyl group -CH2-CH2-CH2-CH3.  
- Position 4 (the carbon alpha to the nitrogen and remote from sulfur) is bonded to a side chain.

Details of the side chain substituent on position 4:
- The methylene attached to Ring A (-CH2-) is bonded to a tertiary nitrogen.  
- That nitrogen bears two substituents:  
  1. one methyl group (-CH3), and
  2. one -CH2- group that leads to Ring B.

Ring B (second thiazole):
- Connected through its carbon-2 (the carbon situated between its own S-1 and N-3) to the methylene coming from the tertiary nitrogen.