Similar names: 1-Piperazinecarboxylic acid, 4-methyl-, (5S)-6-(5-chloro-2-pyridinyl)-6,7-dihydro-7-oxo-5H-pyrrolo[3,4-b]pyrazin-5-yl ester (9CI, ACI); 1-Piperazinecarboxylic acid, 4-methyl-, 6-(5-chloro-2-pyridinyl)-6,7-dihydro-7-oxo-5H-pyrrolo[3,4-b]pyrazin-5-yl ester, (S)- (ZCI); 5H-Pyrrolo[3,4-b]pyrazine, 1-piperazinecarboxylic acid deriv. (ZCI); (+)-Eszopiclone; (+)-Zopiclone; (S)-Eszopiclone; (S)-Zopiclone; [(7S)-6-(5-Chloropyridin-2-yl)-5-oxo-7H-pyrrolo[3,4-b]pyrazin-7-yl] 4-methylpiperazine-1-carboxylate; Esopiclone; Estorra; Eszopiclone; Lunesta; 4-Methyl-1-piperazinecarboxylic acid (5S)-6-(5-chloro-2-pyridinyl)-6,7-dihydro-7-oxo-5H-pyrrolo[3,4-b]pyrazin-5-yl ester