Recent Examples on the WebSuch medications act by inhibiting the action of phosphodiesterase enzymes that normally degrade cyclic guanosine monophosphatec (GMP) and cyclic adenosine monophosphate (cAMP). Bruce Y. Lee, Forbes, 9 Apr. 2022 The amoebas sought after an acid called adenosine monophosphate that flooded the maze’s end. Theresa Machemer, Smithsonian Magazine, 1 Sep. 2020