A proof that the prepotential for pure N = 2 Super-Yang-Mills theory associ
ated with Lie algebras B-r and C-r satisfies the generalized WDVV (Witten-D
ijkgraaf-Verlinde-Verlinde) system was given by Marshakov, Mironov, and Mor
ozov. Among other things, they use an associative algebra of holomorphic di
fferentials. Later Ito and Yang used a different approach to try to accompl
ish the same result, but they encountered objects of which it is unclear wh
ether they form structure constants of an associative algebra. We show by e
xplicit calculation that these objects are none other than the structure co
nstants of the algebra of holomorphic differentials.