URL:
  <https://savannah.gnu.org/bugs/?67792>

                 Summary: [chem]: incorrect chemical composition ATP.chem
                   Group: GNU roff
               Submitter: nbehrnd
               Submitted: Tue 09 Dec 2025 10:11:48 PM UTC
                Category: Preprocessor - others/general
                Severity: 3 - Normal
              Item Group: Incorrect behaviour
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Unlocked
         Planned Release: None


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Follow-up Comments:


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Date: Tue 09 Dec 2025 10:11:48 PM UTC By: nbehrnd <nbehrnd>
The current depiction of adenosine triphosphate in example file `atp.chem`,
Hill formula C10H16N5O13P3 is wrong: What should be a pyrimidine moiety (a
ring including two nitrogen atoms) is depicted with one nitrogen only.

For comparison, see the property box of ATP on Wikipedia,
<https://en.wikipedia.org/wiki/Adenosine_triphosphate>.







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