Athanor by arbastro
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How to highlight functional groups

Choose View › Show functional groups. Each group is shaded in its own color and named in a legend, such as Ester, Carboxylic acid and Arene for aspirin. Choose it again to hide them.

Steps

  1. Draw or insert a structure, for example aspirin.

  2. Choose Main menu › View › Show functional groups.

  3. Each group is shaded in its own color and named in the legend under the drawing.

    Aspirin with its ester, carboxylic acid and arene shaded, and the legend under it.Aspirin with its ester, carboxylic acid and arene shaded, and the legend under it.

  4. Choose the command again to hide them.

The highlight is a view: it does not change the document or what you export. When nothing on the page is recognized, the legend says "No functional groups recognized on this page".

Names, properties and checksHow to calculate molecular weight, logP and other propertiesSelect the structure and choose Object › Chemistry › Calculate properties. The Compound info panel opens at Calculated, with the formula, exact mass, TPSA, donors, acceptors, rotatable bonds and the Lipinski rule-of-five checks.

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Last updated Nov 12, 2026