https://doi.org/10.1351/goldbook.13977
Constitutional unit of a macromolecular rotaxane consisting of an end-group of its macromolecular component and a complementary threading or macrocyclic component.
Note: End-group is a constitutional unit that is an extremity of a macromolecule or oligomer molecule. An end-group is attached to only one constitutional unit of a macromolecule or oligomer molecule.