Identification of products from canthaxanthin oxidation
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Canthaxanthin is a carotenoid that lacks pro-vitamin A activity but is known to have antioxidant activity. The products of its oxidation in oxygen were found to be mainly substituted apo-carotenals and apo-carotenones. The product profile resembles that obtained in the oxidation of β-carotene, except that with canthaxanthin these products are the 4-oxo-β-apo-carotenals and 4-oxo-β-apo-carotenones. Epoxides and diepoxides were clearly identified from β-carotene oxidation but in contrast, with canthaxanthin, apart from 5,6-epoxy-canthaxanthin, which was detected at the early stage of oxidation and minor quantities of 5,6-epoxy-β-ionone and 5,6-epoxy-4-oxo-β-apo-11-carotenal, no other epoxides were detected. The identities of these products lead us to suggest that the mechanism of canthaxanthin oxidation bears significant similarity to that of β-carotene.
Mordi , R C & Walton , J C 2016 , ' Identification of products from canthaxanthin oxidation ' , Food Chemistry , vol. 197 , no. Part A , pp. 836-840 . https://doi.org/10.1016/j.foodchem.2015.11.053
DescriptionJohn C. Walton and Raphael C. Mordi acknowledge the financial support of EaStCHEM.
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