Sure no problem.
The problem is that I have a hash (inside a hash etc). I also have the key like: $my_key = "\{a1\}\{a2\}" ;
That is the situation.
I can use a regexp to split $my_key into an array an than extract the value from the hash via a for-loop, but it would be easier if I could directly insert $my_key into the hash, like $mh-{$my_key} or $mh->$my_key (but now $my_key is a method)

Hopefully this helps!