The molecule features a single chiral (S-configured) sp3-hybridized "central carbon" that bears three substituents:
1. A methyl group.
2. An ethoxycarbonyl group (-C(=O)-O-C-C), in which the carbonyl is directly bonded to the central carbon and the ester oxygen is attached to an ethyl chain.
3. A negatively charged nitrogen, which is single-bonded to a sulfur atom.

This sulfur is double-bonded to two oxygen atoms and is also single-bonded to the anionic nitrogen (described above) as well as to a tertiary nitrogen. The tertiary nitrogen carries two substituents:
1. A methyl group.
2. A straight three-carbon chain whose terminal carbon is triple-bonded to a nitrogen (i.e., a nitrile group).