This illustration depicts the molecular structure of adenosine monophosphate (AMP), also known as adenylic acid. The structure includes a phosphate group, an adenine base, and a ribose sugar. The illustration uses color coding with red, grey, blue, and yellow spheres representing different atoms or groups within the molecule. The red spheres indicate oxygen atoms, the grey spheres indicate carbon atoms, the blue spheres indicate nitrogen atoms, and the yellow sphere indicates a phosphate group.