7-oxo-6-(pyridin-2-yl)-6,7-dihydro-5H-pyrrolo[3,4-b]pyrazin-5-yl 4-methylpiperazine-1-carboxylate;Zopiclone Deschloro Impurity
7-oxo-6-(pyridin-2-yl)-6,7-dihydro-5H-pyrrolo[3,4-b]pyrazin-5-yl 4-methylpiperazine-1-carboxylate;Zopiclone Deschloro Impurity