Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.


The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation

Search Page


My NCBI Filters

Results by year

Table representation of search results timeline featuring number of search results per year.

Year Number of Results
2004 2
2007 1
2008 3
2024 0

Text availability

Article attribute

Article type

Publication date

Search Results

6 results

Results by year

Filters applied: . Clear all
Page 1
8-(3-(R)-aminopiperidin-1-yl)-7-but-2-ynyl-3-methyl-1-(4-methyl-quinazolin-2-ylmethyl)-3,7-dihydropurine-2,6-dione (BI 1356), a highly potent, selective, long-acting, and orally bioavailable DPP-4 inhibitor for the treatment of type 2 diabetes.
Eckhardt M, Langkopf E, Mark M, Tadayyon M, Thomas L, Nar H, Pfrengle W, Guth B, Lotz R, Sieger P, Fuchs H, Himmelsbach F. Eckhardt M, et al. Among authors: langkopf e. J Med Chem. 2007 Dec 27;50(26):6450-3. doi: 10.1021/jm701280z. Epub 2007 Dec 1. J Med Chem. 2007. PMID: 18052023
(R)-8-(3-amino-piperidin-1-yl)-7-but-2-ynyl-3-methyl-1-(4-methyl-quinazolin-2-ylmethyl)-3,7-dihydro-purine-2,6-dione (BI 1356), a novel xanthine-based dipeptidyl peptidase 4 inhibitor, has a superior potency and longer duration of action compared with other dipeptidyl peptidase-4 inhibitors.
Thomas L, Eckhardt M, Langkopf E, Tadayyon M, Himmelsbach F, Mark M. Thomas L, et al. Among authors: langkopf e. J Pharmacol Exp Ther. 2008 Apr;325(1):175-82. doi: 10.1124/jpet.107.135723. Epub 2008 Jan 25. J Pharmacol Exp Ther. 2008. PMID: 18223196
3,5-Dihydro-imidazo[4,5-d]pyridazin-4-ones: a class of potent DPP-4 inhibitors.
Eckhardt M, Hauel N, Himmelsbach F, Langkopf E, Nar H, Mark M, Tadayyon M, Thomas L, Guth B, Lotz R. Eckhardt M, et al. Among authors: langkopf e. Bioorg Med Chem Lett. 2008 Jun 1;18(11):3158-62. doi: 10.1016/j.bmcl.2008.04.075. Epub 2008 May 1. Bioorg Med Chem Lett. 2008. PMID: 18485703