Actually there are a number of drugs that affect many different body systems. So 2-73 is not unique in that regard.
Just as there are many causes of CNS disease, restoring or improving degraded homeostasis can have a positive impact on many diseases.
How many diseases 2-73 and 3-71 might affect is not known. Could be many or it could be just the ones we are looking at currently. There are tantalizing hints that 2-73 might have a positive impact on a multitude of diverse body systems. Hints are not proof, that is what trials are for.
Once 2-73 is approved for something and the company starts generating revenues the company can cast a wider net to see what additional application can be found for 2-73.