Chemical Research Letters, May 2021. An article , which mentions Quality Control of (S)-4-Phenylthiazolidine-2-thione, molecular formula is C9H9NS2. The compound – (S)-4-Phenylthiazolidine-2-thione played an important role in people’s production and life., Quality Control of (S)-4-Phenylthiazolidine-2-thione
Nocardiolactone was synthesized by using a Crimmins asymmetric aldolization followed by a DMAP-mediated removal of the auxiliary with concurrent protection of the carboxylic group as a benzyl ester, activation of the beta-hydroxyl group as a mesylate, hydrogenolysis of the benzyl ester, and a novel DBU-mediated lactonization that converted the syn-configuration to the trans one. Georg Thieme Verlag Stuttgart.
The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 185137-29-5 is helpful to your research. Quality Control of (S)-4-Phenylthiazolidine-2-thione
Reference：
Quinuclidine – Wikipedia,
Quinuclidine | C7H780N | ChemSpider