Dear Nour
The structure in the paper is only fullerene-like, so it is unfortunately not available in our internal database. So you have several options:
1. You can ask the authors to provide you with a file, e.g. .xyz or .cif, which you can open with VNL and go from there.
2. You can search for the structure in databases you might have access to, and get a file from there, which you can open in VNL.
3. You can use a 24-atom fullerene from the VNL database and change the elements to fit your system, and then see if the results are consistent with your expectations.