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. 1975 Sep 5;189(4205):810-11.
doi: 10.1126/science.1162354.

Occurrence of S-methyl thioesters in urines of humans after they have eaten asparagus

R H White

Occurrence of S-methyl thioesters in urines of humans after they have eaten asparagus

R H White. Science. .

Abstract

Gas chromatography-mass spectrometry was used to determine the odor-causing agent (or agents) present in the urines of humans after they have eaten asparagus. S-Methyl thioacrylate and S-methyl 3-(methylthio)thiopropionate were identified from methylene chloride extracts of such urines and appear to be the odor-causing compounds. Methanethiol, the previously reported odor-causing agent, was not detected in these methylene chloride extracts.

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