Anavex 2-73 is the only mixed muscarinic/sigma-1 I know of being researched, let alone being researched for AD. If it isn't Anavex, I bet it's a researcher who is using 2-73 (just like the recent MS study just presented at ACTRIMS). We'll see.
I really doubt the company is going to wait for a scientific forum to release 12-week data if it's good. I am pretty confident they will PR the top line results when they get them. Most biotechs do.