These versions of Linux all have Python 2.2.* installed in /usr/bin. We provide a version of Python-OEChem that will work with this version.
However, since most users will want a later version, we provide a version of Python-OEChem that works with Python 2.3.4, built with the version of gcc in /usr/bin. You'll need to build this version of Python, per the instructions in the section on compiling Python from source. If you have a version of gcc installed in /usr/local/bin, you may need to help Python's configure find the right compiler by using the following:
export CC=/usr/bin/gcc ./configure