1. Begin with a phenyl ring bearing two substituents at carbons 1 and 4.
   - At C1, attach a nitrile group; the nitrile group features a carbon atom triple-bonded to a nitrogen atom.
   - At C4, attach a four-atom chain: -CH2-S-CH2-C(=O)-.
2. The terminal carbonyl group (C=O) of the chain is bonded to the nitrogen of a piperidine ring (Ring A). Piperidine is a saturated six-membered heterocycle composed of five carbon atoms and one nitrogen atom. The ring carbon located meta to the nitrogen is a chiral center with an S-configuration and bears a -CH2- substituent.
3. This -CH2- group connects to the nitrogen of a second piperidine ring (Ring B). Ring B features a methyl substituent at the carbon opposite the nitrogen.