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TAUTOMER
Enumeration of tautomers.
Features
Features Description
input file format SDFile
output file format SDFile
enumeration

enumerates all possible tautomers based on a set of transformation rules

output of

  • all tautomers
  • the unique tautomer (one of the most probable)
  • user defined number of tautomers
    (N most probable tautomers)

speed and reliability processes a data set of 100,100 small to medium-sized molecules in 11,886 sec on a 1.0 GHz workstation (120 ms/cpd, 100% conversion rate)
User Interface
Command line interface supporting batch mode
System Requirements
  • Microsoft Windows NT/2000/XP
  • SUSE Linux (Release 8/9/10, Kernel 2.4/2.6 for x86, 32/64bit)
  • RedHat Linux (Release 8/9/Enterprise, Kernel 2.4/2.6 for x86, 32bit)
  • Sun SPARC, Solaris 2.9 or higher
  • Silicon Graphics, IRIX 6.5
Example
TAUTOMER generates either all tautomers of a input structure or only one, but unique tautomeric form.
In the following example TAUTOMER generates all tautomers of urate:
urate
The output file consists of altogether 24 tautomers, six of them are shown below.
structure no. 1 structure no. 2 structure no. 3
structure no. 6 structure no. 7 structure no. 8
The unique tautomeric form of urate is:
urate
Additional Info
Supported types of tautomerism:
  • keto-enol and thioenol exchange
  • imine exchange
  • nonsubstitued heteroaromatic exchange
  • hetero atom hydrogen exchange
  • keten / inol exchange
  • nitro form / aci form of nitro compounds
  • nitroso / oxim exchange
  • cyanuric acid, formamidinsulfon acid, hydrogen cyanide
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