α,β-methylene adenosine 5′-diphosphate (AOPCP, adenosine-5′-O-[(phosphonomethyl)phosphonic acid] or α,β-methylene-ADP) is an analog of adenosine 5′-diphosphate (ADP). It acts as a CD73/ecto-5′-nucleotidase inhibitor. Blocks ecto-5'-nucleotidase-mediated adenosine production by preventing the conversion of AMP to adenosine.

Pigment blue 16 is the metal-free phtalocyane, once found an outlet as a green shade blue but its inferior heat stability and its poorer chemical fastness, coupled with a price almost three times that of the copper containing salt, has resulted in a rapid decline in its consumption for all but very special applications. Pigment blue 16 is used especially to produce metallic finishes. Incorporated in acrylate resin system for this purpose, the pigment is more weatherfast than types of Copper Phthalocyanine Blue. Pigment blue 16 is also used for artists’ paints.