Synonyms: 1-Piperazinecarboxylic acid, 4-methyl-, (5R)-6-(5-chloro-2-pyridinyl)-6,7-dihydro-7-oxo-5H-pyrrolo[3,4-b]pyrazin-5-yl ester (9CI);1-Piperazinecarboxylic acid, 4-methyl-, 6-(5-chloro-2-pyridinyl)-6,7-dihydro-7-oxo-5H-pyrrolo[3,4-b]pyrazin-5-yl ester, (R)-;5H-Pyrrolo[3,4-b]pyrazine, 1-piperazinecarboxylic acid deriv.