Abstract
IN the work of McKee1 and of Hulme2 on apple, two substances have been isolated. One of these, from apple peel2, has been referred to as proline substituted, probably on the same carbon, with methyl and hydroxyl groups. The other, from apple twigs, has been referred to by McKee1 and described above by Urbach as 4-hydroxy-methyl proline, that is, the hydroxyl group is on the methyl side-chain.
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References
McKee, H. S., Comm. and Proc. 8th Int. Cong. Botany, Paris, 1954, Sections 11–12, p. 401.
Hulme, A. C., Comm. and Proc. 8th Int. Cong. Botany, Paris, 1954, Sections 11–12, p. 398; Nature, 175, 1055 (1954).
Bellamy, L. J., “The Infra-red Spectra of Complex Molecules” (London, 1954).
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HULME, A., STEWARD, F. Infra-red Spectra of the New Proline Derivative from the Apple. Nature 175, 171 (1955). https://doi.org/10.1038/175171a0
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DOI: https://doi.org/10.1038/175171a0
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