This is a software package developed for graph-based cheminformatics. For more information, see http://mod.imada.sdu.dk.
The documentation, including installation instructions, can be found at https://jakobandersen.github.io/mod.
If you have cloned the repository first install Autoconf and run ./repo-bootstrap.sh.
The package uses Autotool, so use ./configure, make, and make install to compile and install it.
See https://jakobandersen.github.io/mod/installation.html for details on the package dependencies.