Enter a chemical name into the box and then click submit. If the name can be interpreted, a depiction, a SMILES string, its InChI and its CML will be returned.
Updated 30/3/14: Added support for boronic acid pinacol esters
A paper describing OPSIN is now available from JCIM. If you have found OPSIN useful in your work citing it would be very much appreciated.
Depiction courtesy of the Indigo Toolkit