Pagoclone Pellets for sale Pagoclone Pellets are a research chemical belonging to the class of cyclopyrrolones, also known as Z-drugs. The chemical name for Pagoclone is (S)-Zopiclone Epimer and its CAS number is 133755-23-6. In its pellet form, Pagoclone appears as a small, round pellet containing 10mg of the active ingredient and is highly sought after by researchers studying the effects of Z-drugs on the brain and behavior.