IE *VgV/gn> Luwian *0V/n

Hello,

could anyone, please, help me with following formula?

IE *VgV/gn > Luwian *0V/n (0=empty, nothing)

I found it in a bad photo-copy of an old document. It's almost illegible
:( I can't even read the name of the author of the document.

This part of the documents seems to deal with IE *g/g' > Luwian responses:

1. *ge > ya
2. *g'e > ya
3. *gi > i
4. *g'i > i
????? 5. *VgV/gn>0V/n ?????

Any examples? Thank you very much for your advice and help.

Best,

Pet'usek