The molecule has an aromatic thiophene ring (five-membered ring with sulfur at position 1).
1. At the carbon meta to sulfur, a bromine atom is attached.
2. At the carbon adjacent to sulfur but not adjacent to the brominated carbon, the ring links externally to a methylene linker (-CH2-) and then tertiary nitrogen atom.

The tertiary nitrogen has three substituents:  
a) One methyl group (-CH3).  
b) One acyl substituent, where the nitrogen bonds directly to a carbonyl carbon (C=O). This carbonyl is followed by another methylene group (-CH2-), which is bonded to a carbon of a cyclobutyl ring (a saturated four-membered carbocycle).
c) The third bond is to the thiophene carbon described above.