nonhuman 6 unclassified drug 6 Animals 4 Fluorinated steroids 4 Humans 4 animal 4 chemical structure 4 drug receptor binding 4 drug synthesis 4 fluorinated steroid 4 fluorination 4 human 4 physiology 4 17 phenyl 5alpha androst 16 en 3alpha ol 2 17alpha aza d homosteroid derivative 2 17beta alkynyl derivative 2 17beta carbonitrile 2 2 isopropylmorpholine derivative 2 22 bromoalkynyl derivative 2 2alpha fluoro 3alpha,22,23 trihydroxy 5alpha stigmastan 6 one 2 2alpha fluoro 3beta,22,23 trihydroxy 5alpha stigmastan 6 one 2 3alpha amino 5alpha pregan 20 one 2 3alpha hydroxy 3beta trifluoromethyl 19 nor 5beta pregnan 20 one 2 3alpha hydroxy 5alpha pregnan 20 one 2 3alpha,21 dihydroxy 5 alpha pregnan 20 one 2 3beta carboxamidomethyl 2 3beta hydroxymethyl 2 3beta methyl derivative 2 4 aminobutyric acid A receptor 2 4 aminobutyric acid receptor 2