13C nuclear magnetic resonance spectra 2 17a allyl 3beta acetoxy 17a aza d homoandrost 5 en 17 one 2 17a allyl 3beta methoxy 17a aza d homoandrost 5 en 17 one 2 17a benzyl 3beta acetoxy 17a aza d homoandrost 5 en 17 one 2 17a ethyl 3beta acetoxy 17a aza d homoandrost 5 en 17 one 2 17a ethyl 3beta methoxy 17a aza d homoandrost 5 en 17 one 2 17a methyl 3beta acetoxy 17a aza d homoandrost 5 en 17 one 2 17a methyl 3beta methoxy 17a aza d homoandrost 5 en 17 one 2 17a-aza-d-homoandrost-5-en-17-one derivatives 2 1H nuclear magnetic resonance spectra 2 3beta acetoxy 17a aza d homoandrost 5 en 17 one 2 3beta methoxy 17a aza d homoandrost 5 en 17 one 2 Androstenols 2 Azasteroids 2 Magnetic Resonance Spectroscopy 2 Molecular Structure 2 Support, Non-U.S. Gov't 2 article 2 azasteroid 2 azasteroids 2 carbon nuclear magnetic resonance 2 drug structure 2 drug synthesis 2 mass spectrometry 2 proton nuclear magnetic resonance 2 synthesis 2 unclassified drug 2