  Inflationary scenarios motivated by the Minimal Supersymmetric Standard Model
(MSSM) where five scalar fields are non-minimally coupled to gravity are
considered. The potential of the model and the function of non-minimal coupling
are polynomials of two Higgs doublet convolutions. We show that the use of the
strong coupling approximation allows to obtain inflationary parameters in the
case when a combination of the four scalar fields plays a role of inflaton.
Numerical calculations show that the cosmological evolution leads to
inflationary scenarios fully compatible with observational data for different
values of the MSSM mixing angle $\beta$.
