Optically active 5H-pyrrolo[3,4-b] pyrazine derivative, its preparation and pharmaceutical compositions containing same

摘要

Dextrorotatory isomer of 6-(5-chloro-2-pyridyl)-5-[(4-methyl-l-piperazinyl)carbonyloxy]-7-oxo-6,7-dihydro-5H-pyrrolo[3,4-b]pyrazine, its preparation and pharmaceutical compositions containing it which are usable as tranquillisers and hypnotics.