/usr/share/avogadro/fragments/cyclic_alkenes/ is in avogadro-data 1.2.0-3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/avogadro/fragments/cyclic_alkenes/Z-cycloheptene.cml
/usr/share/avogadro/fragments/cyclic_alkenes/Z-cyclooctene.cml
/usr/share/avogadro/fragments/cyclic_alkenes/cyclohepta-1_3-diene.cml
/usr/share/avogadro/fragments/cyclic_alkenes/cyclohepta-1_3_5-triene.cml
/usr/share/avogadro/fragments/cyclic_alkenes/cyclohepta-1_4-diene.cml
/usr/share/avogadro/fragments/cyclic_alkenes/cyclohexa-1_3-diene.cml
/usr/share/avogadro/fragments/cyclic_alkenes/cyclohexa-1_4-diene.cml
/usr/share/avogadro/fragments/cyclic_alkenes/cyclohexene.cml
/usr/share/avogadro/fragments/cyclic_alkenes/cycloocta-1_3-diene.cml
/usr/share/avogadro/fragments/cyclic_alkenes/cycloocta-1_3_5-triene.cml
/usr/share/avogadro/fragments/cyclic_alkenes/cycloocta-1_3_5_7-tetraene.cml
/usr/share/avogadro/fragments/cyclic_alkenes/cyclopenta-1_3-diene.cml
/usr/share/avogadro/fragments/cyclic_alkenes/cyclopentene.cml