3alpha hydroxy 11,19 epoxypregn 4 ene 20 one 2 3alpha hydroxy 1alpha,11alpha epoxy 5beta pregnan 20 one 2 3alpha hydroxy 1beta,11alpha epoxy 5alpha pregnan 20 one 2 3alpha hydroxy 5alpha pregnan 20 one 2 4 aminobutyric acid A receptor 2 Animals 2 GABA 2 GABAA receptor 2 Male 2 Models, Molecular 2 Molecular Structure 2 Neurons 2 Neurosteroids 2 Oxygen 2 Rats 2 Rats, Sprague-Dawley 2 Receptors, GABA-A 2 Steroids 2 X ray analysis 2 ab initio calculation 2 article 2 biological activity 2 controlled study 2 drug conformation 2 drug receptor binding 2 drug structure 2 eltanolone 2 in vitro study 2 isotope labeling 2 male 2