/usr/share/avogadro/fragments/carboxylic_acids/ is in avogadro-data 1.0.3-1ubuntu4.
This file is owned by root:root, with mode 0o755.
..
/usr/share/avogadro/fragments/carboxylic_acids/2_2-dichloroacetic_acid.cml
/usr/share/avogadro/fragments/carboxylic_acids/2_2_2-trichloroacetic_acid.cml
/usr/share/avogadro/fragments/carboxylic_acids/2_2_2-trifluoroacetic_acid.cml
/usr/share/avogadro/fragments/carboxylic_acids/D-lactic_acid.cml
/usr/share/avogadro/fragments/carboxylic_acids/D-malic_acid.cml
/usr/share/avogadro/fragments/carboxylic_acids/D-tartaric_acid.cml
/usr/share/avogadro/fragments/carboxylic_acids/L-ascorbic_acid.cml
/usr/share/avogadro/fragments/carboxylic_acids/L-lactic_acid.cml
/usr/share/avogadro/fragments/carboxylic_acids/L-malic_acid.cml
/usr/share/avogadro/fragments/carboxylic_acids/L-tartaric_acid.cml
/usr/share/avogadro/fragments/carboxylic_acids/acetic_acid.cml
/usr/share/avogadro/fragments/carboxylic_acids/butanoic_acid.cml
/usr/share/avogadro/fragments/carboxylic_acids/citric_acid.cml
/usr/share/avogadro/fragments/carboxylic_acids/formic_acid.cml
/usr/share/avogadro/fragments/carboxylic_acids/isobutyric_acid.cml
/usr/share/avogadro/fragments/carboxylic_acids/oxalic_acid.cml
/usr/share/avogadro/fragments/carboxylic_acids/propanoic_acid.cml