17α-<i>O</i>-(Aminoalkyl)oxime Derivatives of 3β,14β-Dihydroxy-5β-androstane and 3β-Hydroxy-14-oxoseco-D-5β-androstane as Inhibitors of Na<sup>+</sup>,K<sup>+</sup>-ATPase at the Digitalis Receptor
receptor was used to design these compounds. On that basis, the possibility to designnovel potent inhibitors of Na(+),K(+)-ATPase without being constrained by the stereochemistry of the classical digitalis skeleton in the D-ring region was predicted. The binding affinities of the most potent compounds in the two series, (EZ)-17 alpha-[2-[(2-aminoethoxy)imino]ethyl]-5 beta-androstane-3 beta,14 beta-diol