/usr/share/avogadro/fragments/aromatics/ is in avogadro-data 1.0.3-1ubuntu4.
This file is owned by root:root, with mode 0o755.
..
/usr/share/avogadro/fragments/aromatics/1H-indene.cml
/usr/share/avogadro/fragments/aromatics/aniline.cml
/usr/share/avogadro/fragments/aromatics/anisole.cml
/usr/share/avogadro/fragments/aromatics/anthracene.cml
/usr/share/avogadro/fragments/aromatics/benzaldehyde.cml
/usr/share/avogadro/fragments/aromatics/benzene.cml
/usr/share/avogadro/fragments/aromatics/benzoic_acid.cml
/usr/share/avogadro/fragments/aromatics/benzoyl_chloride.cml
/usr/share/avogadro/fragments/aromatics/caffeine.cml
/usr/share/avogadro/fragments/aromatics/naphthalene.cml
/usr/share/avogadro/fragments/aromatics/nitrobenzene.cml
/usr/share/avogadro/fragments/aromatics/phenol.cml
/usr/share/avogadro/fragments/aromatics/toluene.cml