CML files describe molecules and can be converted to SVG for visualisation.
This is done with the {{cml url="cml-file.xml" height="200" width="200"}} action.
CML files can be generated from .mol files.
At the moment, the SVG view is not very interactive. You can simply zoom into the molecule.
You will need a SVG-enabled browser to view this page.
CML 1 Support
{{cml url="mols4.xml" height="200" width="200"}}
will produce: