Optically active 5H-pyrrolo Ä3,4-bÜ pyrazine derivative, its preparation and pharmaceutical compositions containing it.

摘要

The dextrorotatory isomer of 6-(5-chloro-2-pyridyl)-5-[(4-methyl-1- piperazinyl)carbonyloxy]-7-oxo-6,7-dihydro-5H-pyrrolo[3,4-b]pyrazine, its preparation and the pharmaceutical compositions containing it which can be used as tranquillisers and hypnotics.