/usr/share/avogadro/fragments/cyclic_alkanes/ is in avogadro-data 1.2.0-3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/avogadro/fragments/cyclic_alkanes/1R-camphene.cml
/usr/share/avogadro/fragments/cyclic_alkanes/1R-camphor.cml
/usr/share/avogadro/fragments/cyclic_alkanes/abietic_acid.cml
/usr/share/avogadro/fragments/cyclic_alkanes/adamantane.cml
/usr/share/avogadro/fragments/cyclic_alkanes/cis-decahydronaphthalene.cml
/usr/share/avogadro/fragments/cyclic_alkanes/cubane.cml
/usr/share/avogadro/fragments/cyclic_alkanes/cyclobutane.cml
/usr/share/avogadro/fragments/cyclic_alkanes/cyclodecane.cml
/usr/share/avogadro/fragments/cyclic_alkanes/cycloheptane.cml
/usr/share/avogadro/fragments/cyclic_alkanes/cyclohexane-chair.cml
/usr/share/avogadro/fragments/cyclic_alkanes/cyclohexane-twist-boat.cml
/usr/share/avogadro/fragments/cyclic_alkanes/cyclohexane.cml
/usr/share/avogadro/fragments/cyclic_alkanes/cyclononane.cml
/usr/share/avogadro/fragments/cyclic_alkanes/cyclooctane.cml
/usr/share/avogadro/fragments/cyclic_alkanes/cyclopentane.cml
/usr/share/avogadro/fragments/cyclic_alkanes/cyclopropane.cml
/usr/share/avogadro/fragments/cyclic_alkanes/norbornane.cml
/usr/share/avogadro/fragments/cyclic_alkanes/trans-decahydronaphthalene.cml