/usr/include/rdkit/GraphMol/ForceFieldHelpers/ is in librdkit-dev 201603.5-2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/rdkit/GraphMol/ForceFieldHelpers/CrystalFF/
/usr/include/rdkit/GraphMol/ForceFieldHelpers/CrystalFF/TorsionAngleM6.h
/usr/include/rdkit/GraphMol/ForceFieldHelpers/CrystalFF/TorsionPreferences.h
/usr/include/rdkit/GraphMol/ForceFieldHelpers/MMFF/
/usr/include/rdkit/GraphMol/ForceFieldHelpers/MMFF/AtomTyper.h
/usr/include/rdkit/GraphMol/ForceFieldHelpers/MMFF/Builder.h
/usr/include/rdkit/GraphMol/ForceFieldHelpers/MMFF/MMFF.h
/usr/include/rdkit/GraphMol/ForceFieldHelpers/UFF/
/usr/include/rdkit/GraphMol/ForceFieldHelpers/UFF/AtomTyper.h
/usr/include/rdkit/GraphMol/ForceFieldHelpers/UFF/Builder.h
/usr/include/rdkit/GraphMol/ForceFieldHelpers/UFF/UFF.h