Update of bug #67876 (group groff):
Status: In Progress => Fixed
Open/Closed: Open => Closed
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Follow-up Comment #4:
commit bd0d3d8964e40391e7e8263a9041047c6d5b52a8
Author: Norwid Behrnd <[email protected]>
Date: Thu Jan 1 13:35:01 2026 +0100
[chem]: Improve ethamivan visual representation.
* contrib/chem/examples/ethamivan.chem: Improve visual representation.
Reorganize representation of the structure.
- Contract the hydroxyl group, both simplifying the definition of the
substituent and correcting the unusual dihedral angle of 180 degrees
about C-O-H previously used.
- Adjust orientations of the drawing overall and substituents (e.g.,
rules GR-3.1.2, GR-3.1.3; 3.2.1 in [1]), especially alkyl chains
around N (GR-4.1.1, ibid.).
...as one would "clean" the structure drawing in a GUI-based editor, and
indeed with a result very similar to the current depiction on
Wikipedia.[2]
Fixes <https://savannah.gnu.org/bugs/?67876>.
[1] Brecher, J. Graphical Representation Standards for Chemical
Structure Diagrams (IUPAC Recommendations 2008). Pure Appl. Chem.
2008, 80 (2), 277-410. https://doi.org/10.1351/pac200880020277.
[2] https://en.wikipedia.org/wiki/Etamivan
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