This ultimate suite includes ChemDraw Ultra 7.0, Chem3D Ultra 7.0 and ChemFinder Ultra 7.0. It adds E-Notebook Ultra 7.0, BioAssay Pro 7.0, MOPAC, Gaussian & GAMESS interfaces, ChemSAR Server Excel, CLogP, Purchasing for Excel, CombiChem/Excel, and even more, as well as the full set of ChemInfo databases, including ChemACX & ChemACX-SC, The Merck Index and ChemMSDX, to ChemOffice Pro.

ChemDraw and ChemOffice Note

We now have users go to Cambridgesoft to download and register a copy. The "download" links below will link you to the following Cambridge Soft web site ...

  1. Visit
  2. Enter their Williams College email in the email field.
  3. Create a CambridgeSoft user account.
  4. Download and install ChemDraw or ChemOffice.
  5. Activate the software.

Contact [email protected] with any problems or questions.

Where is it available on campus?

Chemoffice is available in all campus computer labs, and on all lecterns. Here's a map showing locations.

Which versions are available?

PC: Chemoffice 12.2
Mac: Chemoffice 12.2

How do I get help?

For help with installation, contact Adam Wang, [email protected]. To learn how to use ChemOffice, check out the ChemOffice tutorials on the manufacturers website, and these helpful community sites.


If the installer gives an endless loop of asking for registration information, entering it, then the program exiting. It is a known bug, and PerkinElmer, the ChemDraw people, have posted a solution. It is found here:


This software can be downloaded from an external site. Clicking on an icon below will take you to that site.

Click on an icon below to start downloading. If you see only gray icons, this application is not currently available for your operating system.

We were unable to detect your operating system.

How can I tell if I'm running 32bit or 64bit Windows?