Conformations of Epristeride（ 17-β-N-t-butylcarboxamide-androst-3,5-diene-3-carboxylic acid） and its analogs were analyzed with the random search method and compared by means of the methods for steroid conformers, Connolly surfaces, dihedral angles, and molecular accessibility probes with protons, hydroxyl and methyl groups contained simultaneously. Analog d is different from others, which is in accordance with the preliminary clinical trial results under double blind conditions.
