Learn More About STN
Cookies are Disabled
Your browser currently has cookies disabled; STN requires enabled cookies. Change the setting in your browser or contact your administrator.
Welcome to STN!
The new STN platform delivers essential value-added content from CAS and Thomson Reuters' Derwent World Patents Index, along with global full-text patent information, in an intuitive, powerful interface designed for professional IP searching. Leveraging cutting-edge technology, new STN revolutionizes patent searching by making it possible to explore STN's unique content collection in new ways to find answers fast and develop unique insight.
Training Opportunities
The new search interface has been completely redesigned to integrate with users’ workflow and increase efficiency. Training and support materials have been created to help you get familiar with the new look and feel, and transition your search experience to the new STN platform. Training opportunities include:
  • In-product Help - Accessible on demand, Help provides search examples and key content details, and is formatted for easy printing if desired.
  • Orientation - A variety of live and recorded sessions are available to help you become familiar with the new STN platform and keep up to date on the latest enhancements.

Questions? Contact Us for assistance.
Suggestions or feedback?
Submit an enhancement suggestion or provide feedback via Contact Us.
Search by:
select DB
Retrieve patents by entering a chemical name


Attention: Your query may not have produced the results you were expecting

    A system error occurred. Please try again.


    Current Selections (0)
    Current Selections(0)
    Select All Deselect All
      Select All Deselect All | Expand All Collapse All

        casdraw test
        Click to Edit
        Click image to draw or import structure Click image to change structure
        Structure is too general. Select limiter(s) below, draw additional atoms and bonds, or lock out rings and chains. Structure is too general. Select limiter(s) below to make search more specific.