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Databases for Chemists and Chemical Engineers

MDL Databases: Frequently Asked Questions and Help

Frequently Asked Questions

What is ISIS?
ISIS is a client/server scientific information system that supports the registrations, retrieval, display, and analysis of chemical structures, reactions, 3D models, and related scientific information.
What hardware and software is required for using the MDL files?
Workstations must meet the following standards:
  • Windows 95 / NT 4.0 or Macintosh PowerPC
  • 16 MB RAM; 30 MB disk space
  • Internet access
  • Netscape 4.0 or Internet Explorer
How are chemical structures represented by MDL?
MDL leads the industry with their extensive chemical structure representation — from 2D and 3D structures, to polymers and mixtures, to generic structures, to chemical reactions.
What type of structure searching capabilities are available in MDL?
Extensive structure searching, including substructure, similarity, stereochemistry, 3D models, combinatorial libraries, reactions, and much more, are combined with simultaneous data searching.
What types of file formats are available in MDL?
MDL’s published file formats for chemical structures, reactions, and data have become de facto industry standards. MDL’s CTfile Formats documentation may be downloaded (registration required).

Help and Information

Last modified: November 30, 2005

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