in studies designed to ascertain the organs secreting these compounds into semen it was found that : quantitative analyses of semen obtained pre- and post-vasectomy showed markedly decreased l-carnitine concentrations , slightly decreased acetylcarnitine levels , and unchanged propionyl- and butyrylcarnitine concentrations as a result of vasectomy .
C0007258
carnitine
C0001040
acetylcarnitine