Making C6D6 in geant4

I want to make a compound C6D6 in geant4 to be used in a detector. Could anyone give me some hint as to how to proceed?

Start here: Book For Application Developers — Book For Application Developers 11.0 documentation

Type “compound” into the search box on the left sidebar.

https://geant4-userdoc.web.cern.ch/UsersGuides/ForApplicationDeveloper/html/Detector/material.html?highlight=compound