  We study energy levels of two heteronuclear molecules moving in a spherically
symmetric harmonic trap. A role of electric dipole interactions is compared and
contrasted with our earlier results (https://arxiv.org/abs/1512.00631) for two
magnetic dipolar atoms. We stress importance of a rotational energy with its
value which is very high compared to the energy of dipolar interaction. We show
that dipolar forces do not play a significant role in the ground state of the
system under typical experimental conditions. However, there exist excited
states that exhibit anticrossings similar to the ones observed for magnetic
dipoles.
