Medchemexpress, HY-14873 5mg Tonapofylline CAS:340021-17-2 Tonapofylline (BG 9928) is an orally active and selective adenosine A 1 receptor antagonist with a K i of 7.4 nM for human adenosine A 1 receptor (hA 1 ), which displays 915-fold selectivity versus human adenosine A 2A receptor and 12-fold selectivity versus human adenosine A 2B receptor and is used in development for the treatment of heart failure [1] [2] . Purity:>98% Medchemexpress has over 10000 novel life-science reagents, reference compounds, APIs and natural compounds for laboratory and scientific use. Other quantity can also be offered.