1. Main Ring (6-membered): Number positions 1 through 6 in a clockwise direction. Positions 1, 2, 4, 5, and 6 are carbons; position 3 is nitrogen.
   - C-1 bears a methyl group.
   - C-2 is doubly bonded to an oxygen (a ring carbonyl).
   - N-3 carries a single substituent described below.
   - C-4 and C-5, C-1 and C-6 are connected by double bonds.
2. Substituent on N-3:
   - A two-carbon chain is attached to N-3.
   - The terminal carbon has a hydroxyl group and is also doubly bonded to a nitrogen.
   - That nitrogen is bonded to a sulfonyl group, where the sulfur has two double bonds to oxygen (-S(=O)2-) and is also bonded to a pyridine ring.
   - This pyridine ring has its nitrogen at ring position 1 and a trifluoromethyl group (-CF3) at ring position 3. The attachment to the sulfur is at position 6. No other ring substituents are present in that pyridine fragment.