Fig. 5. Binding affinity of receptor 1 toward female hormones.

(A) Schematic representation of the binding preference of receptor 1 toward female hormones 3a to 3c and 4a to 4c in water. ¹H NMR spectra (500 MHz, D₂O, room temperature) of products obtained from equimolar mixtures of (B) 2e and 3a, (C) 3a and 4a, and (D) 4a and 4c with 1. (E) Binding preference of 1 toward 3b and 5α-androstane (5c) in water.