Repeating Units with Repetition Ranges - Frequency Variation

A sequence of ranges to specify the repetition can also be used in a special group called repeating unit with repetition ranges. See the figure below for an example.

In this example, the repetition range is 3,5-7. The repetition count for the included structure can be 3,5,6, or 7. The repetition range can contain ranges and numbers, these elements must be separated by commas. For example, 3, 5-7.

***ATTENTION***
From 25.3.0 (frequent) and Radium.2 (LTS) releases: when interpreting the range of the repeating unit (cases: enumerating a Markush structure; counting the number of enumerated structures; search), it is possible that not the whole range is used, only some representatives of it. For details see repeating unit limitations.

To draw a repeating unit with repetition ranges, follow the steps below.

1. Draw the structure.
2. Click the Create Group tool on the toolbar and select the structure to be included in the range.
3. In the Create Group dialog window, choose the type Repeating unit with repetition ranges from the Type list.
4. Set the repetition ranges.
5. Click OK.