Humans 8 Spectrometry, Mass, Electrospray Ionization 8 chemistry electrospray mass spectrometry 8 human article 6 Animals 4 Magnetic Resonance Spectroscopy 4 animal 4 nuclear magnetic resonance spectroscopy 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 (17beta) n ((t butylcarbamoyl)methyl) n (4 chlorophenyl) 4,4 dimethyl 3 oxoandrost 5 ene 17 carboxamide 2 (17beta) n ((t butylcarbamoyl)methyl) n (4 fluorophenyl) 4,4 dimethyl 3 hydroxyandrost 5 ene 17 carboxamide 2 (17beta) n ((t butylcarbamoyl)methyl) n (4 fluorophenyl) 4,4 dimethyl 3 oxoandrost 5 ene 17 carboxamide 2 (17beta) n ((t butylcarbamoyl)methyl) n (4 methoxyphenyl) 4,4 dimethyl 3 hydroxyandrost 5 ene 17 carboxamide 2 (17beta) n ((t butylcarbamoyl)methyl) n (4 methoxyphenyl) 4,4 dimethyl 3 oxoandrost 5 ene 17 carboxamide 2 (17beta) n ((t butylcarbamoyl)methyl) n (4 methylphenyl) 4,4 dimethyl 3 hydroxyandrost 5 ene 17 carboxamide 2 (17beta) n ((t butylcarbamoyl)methyl) n phenyl 4,4 dimethyl 3 hydroxyandrost 5 ene 17 carboxamide 2 (17beta) n ((t butylcarbamoyl)methyl) n phenyl 4,4 dimethyl 3 oxoandrost 5 ene 17 carboxamide 2 2 (t butylamino) 2 oxoethyl (17beta) 4,4 dimethyl 3 hydroxyandrost 5 ene 17 carboxylate 2 4,4-Dimethyl sterols 2 7,8 dihydroneopterin 2 7,8-dihydrobiopterin 2 7,8-dihydroneopterin 2