how to fetch specific string

Summary:

Hi

I want to fetch specific string from given string. Whatever value is present in "()" that need to be fetched.

Industrial Minerals Company (IMC) ---> IMC

Ma'den Phosphate Company (MPC) ---> MPC

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):