Table 2

Energies of the sulfated products of 22R and 22S epimers of budesonide

MoleculeEnergy
kcals/mol
Budesonide − 22R 30.55
Budesonide − 22R, 11 sulfate25.58
Budesonide − 22R, 21 sulfate21.17
Budesonide − 22S 30.84
Budesonide − 22S, 11 sulfate26.03
Budesonide − 22S, 21 sulfate20.62

SYBYL version 6.4 molecular modeling package was used for all modeling procedures.