  We re-express the quantum Calogero-Sutherland model for the Lie algebra E7
and the particular value of the coupling constant K=1 by using the fundamental
irreducible characters of the algebra as dynamical variables. For that, we need
to develop a systematic procedure to obtain all the Clebsch-Gordan series
required to perform the change of variables. We describe how the resulting
quantum Hamiltonian operator can be used to compute more characters and
Clebsch-Gordan series for this exceptional algebra.
