/usr/share/avogadro/fragments/aromatics/ is in avogadro-data 1.2.0-1+deb9u1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/avogadro/fragments/aromatics/1H-indene.cml
/usr/share/avogadro/fragments/aromatics/1H-indole.cml
/usr/share/avogadro/fragments/aromatics/1_10-phenanthroline.cml
/usr/share/avogadro/fragments/aromatics/1_8-naphthyridine.cml
/usr/share/avogadro/fragments/aromatics/2H-chromene.cml
/usr/share/avogadro/fragments/aromatics/4H-chromene.cml
/usr/share/avogadro/fragments/aromatics/7H-purine.cml
/usr/share/avogadro/fragments/aromatics/9H-carbazole.cml
/usr/share/avogadro/fragments/aromatics/9H-fluorene.cml
/usr/share/avogadro/fragments/aromatics/9H-xanthene.cml
/usr/share/avogadro/fragments/aromatics/acenaphthene.cml
/usr/share/avogadro/fragments/aromatics/acenaphthenequinone.cml
/usr/share/avogadro/fragments/aromatics/acenaphthylene.cml
/usr/share/avogadro/fragments/aromatics/acridine.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/benzofuran.cml
/usr/share/avogadro/fragments/aromatics/benzoic_acid.cml
/usr/share/avogadro/fragments/aromatics/benzothiophene.cml
/usr/share/avogadro/fragments/aromatics/benzoyl_chloride.cml
/usr/share/avogadro/fragments/aromatics/caffeine.cml
/usr/share/avogadro/fragments/aromatics/chromone.cml
/usr/share/avogadro/fragments/aromatics/cinnoline.cml
/usr/share/avogadro/fragments/aromatics/coumarin.cml
/usr/share/avogadro/fragments/aromatics/isoquinoline.cml
/usr/share/avogadro/fragments/aromatics/naphthalene.cml
/usr/share/avogadro/fragments/aromatics/nitrobenzene.cml
/usr/share/avogadro/fragments/aromatics/phenanthrene.cml
/usr/share/avogadro/fragments/aromatics/phenol.cml
/usr/share/avogadro/fragments/aromatics/phthalimide.cml
/usr/share/avogadro/fragments/aromatics/quinazoline.cml
/usr/share/avogadro/fragments/aromatics/quinoline.cml
/usr/share/avogadro/fragments/aromatics/tetralin.cml
/usr/share/avogadro/fragments/aromatics/toluene.cml
/usr/share/avogadro/fragments/aromatics/uric_acid.cml