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The bitter principles of citrus fruit; isolation of nomilin, a new bitter principle from the seeds of oranges and lemons

Emerson, O.H.

Journal of the American Chemical Society 70(2): 545-549

1948

ISSN/ISBN: 0002-7863
PMID: 18907746
DOI: 10.1021/ja01182a034
Accession: 025693298
Orange and lemon seeds yielded nomilin, C28H34O9, which is a new bitter principle. The absorption spectra is quite similar to that of limonin but chemically the 2 are different. Suggestions are made as to the nature of the non-bitter precursors of these compounds. The conversion of the precursor to limonin is catalyzed by hydrogen ion and by heat. There is no evidence that enzymes are involved. A third bitter component was isolated from orange seeds but not fully characterized.

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