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The SMARTS format is a language for matching substructures of chemical files and was created by Daylight Chemical Information Systems, Inc. alongside the SMILES format.

Specification URL

Limitations of the Open Babel SMARTS Implementation

The Open Babel implementation of SMARTS is not bug-free, nor does it support everything in the Daylight Toolkit. In particular, it does not currently support:

  • Component-level grouping (i.e., "(C).(C)")
  • Use of non-tetrahedral chirality

This list may not be complete. Please e-mail the <a href="mailto:[email protected]">openbabel-discuss</a> mailing list if you have questions about the SMARTS support in Open Babel.