The carotenoid composition of the flower of was investigated for the first time by HPLC-DAD-MS. In addition to the main carotenoid lutein and its geometrical isomers, 5,6-epoxy-carotenoids, namely violaxanthin, lutein 5,6-epoxide and antheraxanthin, were detected in larger amounts. In addition, β-carotene 5,6-epoxide and β-carotene 5,6,5',6'-diepoxide were found, which occurs very rarely in plants. For unambigous identification, β-carotene 5,6-epoxide and β-carotene 5,6,5',6'-diepoxide were prepared semisynthetically, and they were characterized by H and C NMR and HPLC-CD methods.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10747434 | PMC |
| http://dx.doi.org/10.3390/plants12244116 | DOI Listing |
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