In the S-group dialog, you can create a repeating unit, an SRU polymer, a link node, or a copolymer.
It is also possible to change the repeat pattern and the label of these substructural groups.
Repeat Pattern Values
- (ht): Head-to-tail (not displayed on the canvas).
- hh: Head-to-head.
- eu: Either/unknown.
- Number (for example, 3).
- Range (for example, 5–8).
- Lowercase letters (a–z except for c and f).
- Co for copolymers.