Annotating chemical terms marked up with microformats. Screenshots showing a blog post (full URL: ) containing chemical terms marked up with chemical microformats, (a) without and (b) with the "Sechemtic" userscript enabled. The added hyperlinks allow the user to look up the structure in Google, ChemSpider and PubChem.
Willighagen et al. BMC Bioinformatics 2007 8:487 doi:10.1186/1471-2105-8-487