How about this:
1. Google "pentacene pdb"
2. Go to first link (
http://www.t3db.org/toxins/T3D0629)
3. Open the PDB file (you could take the MOL file too, but it has coordinates in Bohr, I think), PDB is in Angstrom, making it a bit easier
4. Copy the HETATM part, paste in your favorite editor and convert to XYZ format (I use Excel, it has a wonderful "text to columns" function)
5. Save as XYZ file (see attachment)
6. Bring into VNL
You could build it in VNL too, in particular in the new Builder coming in 12.2, but it will still take longer time than the steps above
