p-dimethylaminopyridine and dicyclohexylcarbodiimide as dehydrating agent. The esters were obtained in pure form after column chromatography, and their structures were verified and confirmed by analytical methods (IR and UV spectra). The 12 esters were tested in vivo against P388, L1210 leukemias, Ehrlichascitestumor, and melanoma B16. The esters 3 alpha-hydroxy-13 alpha-amino-13,17-seco-5 alpha-androstan-17-