ARL67156 (FPL 67156) triethylamine is a selective small is a selective samll molecular inhibitor, targeting to ecto-ATPase , CD39 , and CD73 . ARL67156 triethylamine is also a competitive inhibitor of NTPDase1 ( CD39 ), NTPDase3 and NPP1, with K i s of 11, 18 and 12 μM, respectively. ARL67156 triethylamine can be used in the research of disease like calcific aortic valve disease, asthma .