Replacing Tags

I have tags in my folders ie %ALBUM% has a Value of

this
Diva (Germany PL 75326) (24-96)
and I would like to replace it with
DIVA

removing anything starting with the first bracket to the end

I would like to create an Action to do this preferably

Can anyone help me out with this.

Perhaps an action of the type "Guess value" (import tag-fields) for the field ALBUM serves the purpose.
Pattern: %album% (%dummy%

Works quite nicely - Thank You