If the structure consists of more than one repeating unit (mon, mer) or structural repeating unit, Copolymer (co) brackets/groups can be used to represent the structure. Copolymers might contain crossing bonds and star atoms. The following copolymers can be drawn:
See the figure below for an example.
To draw a copolymer, follow the steps below.
To add a new sub-polymer to a copolymer, draw the sub-polymer to add outside of the bracket and drag one part of the bracket to include the new sub-polymer. The new molecule is marked with blue circles when you hover the mouse cursor over it.
To delete a sub-group from a copolymer, select the sub-polymer to be deleted and press the Delete button on your keyboard or delete it with the Erase tool.