Eszopiclone (S-Zopiclone) with CAS No:138729-47-2 is an impurity standard of Eszopiclone. Eszopiclone is a medication belonging to the class of drugs known as nonbenzodiazepine hypnotics. It is primarily prescribed for the short-term treatment of insomnia, helping individuals initiate and maintain sleep. Eszopiclone works by acting on the gamma-aminobutyric acid (GABA) receptors in the brain, enhancing the inhibitory effects of GABA, a neurotransmitter that promotes relaxation and sleepiness. Commonly sold under the brand name Lunesta, eszopiclone is typically taken orally before bedtime, and its use is recommended for durations of no more than a few weeks to avoid the development of dependence. Buy high quality Eszopiclone (S-Zopiclone) from from Molsyns Research. Molsyns Research is one of the leading manufacturer and exporter of Eszopiclone (S-Zopiclone)