Abstract
A newly recognized amino acid of barley, wort, and hops has been identified as l-(—)-pipecolinic acid (piperidine-2-carboxylic acid). It has been isolated in the pure state from hops by means of chromatography. Its identity has been established, among other ways, by means of its reactivity with a number of reagents, which have in this study been applied generally to the identification of amino acids on paper chromatograms.