MarvinSketch : Repeating units with repetition ranges

A sequence of ranges to specify the repetition can also be used in a special group called repeating unit with repetition ranges.

For example: 

Here the repetition range is "3,5-7". The repetition count for the included structure can be: 3,5,6 or 7.

Syntax of the repetition ranges

The repetition ranges consist of ranges separated by commas. A range can be either a simple non-negative number (e.g. 3) or two non-negative numbers separated by "-" (e.g. 5-7).

To draw a repeating unit with repetition ranges

1. Draw the structure that forms or contains the repeating unit.
2. Click the Group tool on the toolbar, and select the structure.
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.