Structure constants of $su(2S+1)$ algebra and the decomplexification of   the Liouville-von Neumann equation
  he analytic formulas for structure constants of $su(2S+1)$ algebra in terms of $3jm$ and $6j$ symbols of $su(2)$ have been derived for the decomplexification of the Liouville-von Neumann equation. 
E. A. Ivanchenko