(S)-1-((S)-3-mercapto-2-methylpropanoyl)pyrrolidine-2-carboxylic acid-13C5; ([2S]-N-[3-Mercapto-2-methylpropionyl]-L-proline-13C5; SQ-14225--13C5
(S)-1-((S)-3-mercapto-2-methylpropanoyl)pyrrolidine-2-carboxylic acid-13C5; ([2S]-N-[3-Mercapto-2-methylpropionyl]-L-proline-13C5; SQ-14225--13C5