Increasing the Efficiency Efficiency of Ligands for the FK506-Binding Protein 51 by Conformational Control: Complex of FKBP51 with (1S,6R)-3-[2-(3,4-dimethoxyphenoxy)ethyl]-10-[(2-oxo-2,3-dihydro-1,3-benzothiazol-6-yl)sulfonyl]-3,10-diazabicyclo[4.3.1]decan-2-one
