You might consider that Anavex gets Rett approved and has a significant revenue stream. 2-73 gets approved for AD and Anavex partners and now has very big revenue stream. At that point it can develop 3-71 and not need a partner and can go it alone if it chooses. 3-71 will take 5 years to get to approval at least. So Anavex will have plenty of time to reap the rewards of 2-73.
It all depends on what MIssling and the BOD's vision of the future is for the company.