Optically active 5H-pyrrolo[3,4-b]pyrazine derivative, its preparation and pharmaceutical… Grant US-7381724-B2 United States of America 03 Jun 2008
Optically active 5H-pyrrolo[3,4-b] pyrazine derivative, its preparation and… Grant US-7125874-B2 United States of America 24 Oct 2006
Optically active 5H-pyrrolo[3,4-b]pyrazine derivative, its preparation and pharmaceutical… Grant US-6864257-B2 United States of America 08 Mar 2005
Optically active 5H-pyrrolo[3,4-b]pyrazine derivative, its preparation and pharmaceutical… Grant US-6444673-B1 United States of America 03 Sep 2002