Repeating group dialog
In Repeating group dialog you can create a Repeating unit, an SRU polymer or a Link node; or you can change the repeat pattern and the label of these substructural groups.
Repeat pattern values
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(ht) - head-to-tail (not displayed on the canvas)
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hh - head-to-head
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eu - either/unknown
Label values
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number (e.g. 3)
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range (e.g. 5-8)
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n