This starts up a program called ConQuest. The operation of this is fairly self-evident. Use the Molecular formula search in the present case. About 250000 entries are present on the database which are searched for matches to this formula. As a hit is found, its REFCODE appears in the ConQuest window. At any time you can select any entry and view its properties, including the original literature reference, a 3D structure and other properties.
Alternatively, click here for Mac or Windows to open up an X-Windows session on Iridium2.