A mash up between Chemrefer, the search engine for open access chemistry papers, and molecular structure search engine Chemspider launched today. I have to confess to playing no small part in facilitating this collaboration having introduced the Chemspider team, virtually speaking, to the owner of Chemrefer, Will Griffiths, who was a Reactive Profilee in June 2006. You can access the chemical mash up here. Search for any term of interest and the new hybrid tool will return all the pertinent results that are available for instant free access from the journal publishers. There are something like 50000 papers accessible this way via a search of more than 14.5million+ chemical entities.