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drug analysis
2
drug identification
drug synthesis
2
infrared spectrometry
2
mass spectrometry
2
nonhuman
nuclear magnetic resonance
2
theoretical study
2
20 hydroxy 3 oxo 23 norchol 4 enoic acid c 14
1
3 oxo 23 norchola 4,20(22) dienoic acid c 14
1
3beta acetoxy 5beta pregnan 20 one
1
3beta hydroxy 23 norchol 20(22) enoic acid c 14
1
3beta hydroxy 23 norchola 5,20(22) dienoic acid c 14
1
3beta,20 dihydroxy 23 norchol 5 enoic acid c 14
1
3beta,20 dihydroxy 23 norcholanic acid c 14
1
Ethyl |1‐14C| bromoacetate
1
Reformatsky reaction
1
Synthesis
1
drug structure
1
methodology
1
priority journal
1
proton nuclear magnetic resonance
1
radioisotope
1
|24‐14C|‐23‐Norcholanic acid derivatives
1
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1JOUR
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2