Ugi reaction article 10 unclassified drug 10 drug synthesis 8 Magnetic Resonance Spectroscopy 6 chemical reaction 6 nonhuman 6 Antifungal 4 Azasteroids 4 Azasterols 4 Fusarium 4 Humans 4 Multicomponent reaction 4 Spectrometry, Mass, Electrospray Ionization 4 Sterols 4 antifungal activity 4 antifungal agent 4 azasteroid 4 chemistry 4 drug effects 4 nuclear magnetic resonance spectroscopy 4 stereochemistry 4 sterol derivative 4 (17beta) 4,4 dimethyl 3 oxoandrost 5 ene 17 carboxylate 2 (17beta) 4,4 dimethyl 3 oxoandrost 5 ene 17 carboxylic acid 2 (17beta) n ((t butylcarbamoyl)methyl) n (2 chlorophenyl) 4,4 dimethyl 3 hydroxyandrost 5 ene 17 carboxamide 2 (17beta) n ((t butylcarbamoyl)methyl) n (2 ethyl 6 methylphenyl) 4,4 dimethyl 3 oxoandrost 5 ene 17 carboxamide 2 (17beta) n ((t butylcarbamoyl)methyl) n (2 fluorophenyl) 4,4 dimethyl 3 oxoandrost 5 ene 17 carboxamide 2 (17beta) n ((t butylcarbamoyl)methyl) n (2 naphthyl) 4,4 dimethyl 3 oxoandrost 5 ene 17 carboxamide 2 (17beta) n ((t butylcarbamoyl)methyl) n (4 chlorophenyl) 4,4 dimethyl 3 hydroxyandrost 5 ene 17 carboxamide 2