Filter name and suffix package on content selector

Sonatype Nexus Repository
1

I want to create content selector and filter based on name and suffix.
for example:on following path
http://vault.centos.org/7.9.2009/os/Source/SPackages/nmap-6.40-19.el7.src.rpm
I want to create an expression in the content selector whose output is as follows:
nmap-6.40-19.el7.src.rpm
In other words, I want to create an expression that filters only based on the package name