Anesthizine

Anesthizine, a fast-acting anesthetic, can be distributed through environmental systems as a gas. Along with neurozine and axonol, anesthizine was considered amongst "the best" anesthetics during the late 24th century. When distributed at 70 parts per million, this anesthetic can typically put a humanoid to sleep. 

In 2372, Cantabrian security chief Ulitania Jonar ordered anesthizine to be used to subdue a fighting civilian crowd aboard the Cantabrian. This was effective in control the crowd to be moved to the ship's brig. (: "Isolation")