ChemBioOffice Ultra is site-licensed by Stanford University Libraries and Academic Information Resources (SU*LAIR) / Academic Computing.
All current Stanford students, faculty, and staff, can download ChemBioOffice Ultra FOR FREE to a office, home, or personal computer, using the email extensions,, or (contact Grace Baysinger at if you do not have one of those email extensions). A network connection is not required to use ChemDraw.

With the release of version 17, our desktop product line has moved to an online fulfillment and entitlement system. All site licenses for v17 and beyond will be administered through Flexnet Operations. Users will be asked to register as a member in this new system in addition to their existing user account on our website. The new system will provide access to download the software and activation codes.

The existing system will still be used to access downloads for earlier versions of the software and for our cloud-based applications.

Please use Internet Explorer or Firefox to request your software.

Site License Verification
  Email Address
  • The domain of your address, the part that comes after the @ symbol, must match that of your company or school.
  • After you enter a qualifying email address you will be led through the download process. We will use this address to email you the serial number and other codes needed for installation.