[{"from": "human", "value": "Could you provide a description of this molecule? [C][N][C][C][N][Branch1][Branch1][C][C][Ring1][=Branch1][C][=Branch1][C][=O][O][C@H1][C][=N][C][=C][N][=C][Ring1][=Branch1][C][=Branch1][C][=O][N][Ring1][#Branch2][C][=N][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][Cl]"}, {"from": "gpt", "value": "The molecule is a nonbenzodiazepine hypnotic drug used to treat insomnia. It is the active stereoisomer of zopiclone, belonging to the class of drugs known as cyclopyrrolones. Cyclopyrrolone drugs demonstrate high efficacy and low toxicity, offering a safer alternative to other drugs used for insomnia.  One major benefit of eszopiclone is that it is approved by the FDA for the long-term treatment of insomnia. This sets it apart from many other hypnotic sedatives, which are generally approved only for the relief of short-term (6-8 weeks) insomnia. Eszopiclone was initially approved by the FDA in 2004."}]