Structure searching in CAS Online using STN Express:
An introductory workshop

Table of Contents

• Objectives
• CAS Registry File
• Advantages and disadvantages
• Using STN Express
• Access to STN Express at the Stanford Libraries
• Overview of structure searching
• Types of structure searches
  • Exact search
  • Family search
  • Substructure search
  • Closed substructure search
• Building structures with STN Express
  • Drawing the carbon skeleton
  • Specifying non-carbon atoms
  • Specifying bonds
  • System defaults
  • Overriding system defaults
• Save and verify structure query
• Understanding what happens when a structure search is run
• Searching structure query
• Batch mode searches
• Structure searching worksheet

Grace Baysinger
Head Librarian & Bibliographer
Stanford University
Swain Chemistry & Chemical Engineering Library
graceb@stanford.edu
650-725-1039

July 1997