Markush Toolbar

This toolbar contains funtions that help to work with Markush structures and it is not visible by default.
To make it visible, choose View > Toolbars > Markush.

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Position Variation Bond

Creates a variable point of attachment to represent a connection point to a group of atoms.

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Frequency Variation

Creates a Repeating Unit with Repetition Ranges.

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R-group attachment

Adds an attachment to the structure.