The molecule is built on a pyridine ring (six-membered aromatic ring with one nitrogen atom).
- Ring substitution: both carbons ortho to the ring nitrogen each carry a chlorine atom.
- Additional substituent: one of the carbons adjacent to a chlorine (meta to the ring nitrogen) bears a side chain.

The details of the side chain:
- Begins with a sulfonamide group: the sulfur is bonded directly to the pyridine carbon, has two double-bonded oxygens, and is also bonded to a nitrogen.
- The sulfonamide nitrogen is extended by a two-carbon chain (-CH2-CH2-).
- This chain links to an ether oxygen.
- From the ether oxygen extends a four-carbon chain, where the terminal two carbons are connected by a double bond (-CH=CH2). The double-bond geometry is not specified.