/usr/share/mate/applications/compton.desktop is in ubuntu-mate-default-settings 18.04.17.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 | [Desktop Entry]
Version=1.0
Type=Application
Name=compton
GenericName=X compositor
Comment=A X compositor
Categories=Utility;
TryExec=compton
Exec=compton
Icon=compton
Keywords=x;x11;compositor;
NoDisplay=true
|