Zopiclone
Zopiclone is a pyrrolo[3,4-b]pyrazine compound having a 4-methylpiperazine-1-carboxyl group at the 5-position, a 5-chloropyridin-2-yl group at the 6-position and an oxo-substituent at the 7-position. It has a role as a central nervous system depressant and a sedative. It is a pyrrolopyrazine and a monochloropyridine.