Isomerization of (all‐E)‐Cycloviolaxanthin. Preparation and Characterization of (9Z)‐ and (13Z)‐Cycloviolaxanthin From (all‐E)‐cycloviolaxanthin (ex Capsicum annuum), (9Z)‐ and (13Z)‐cycloviolaxanthin were prepared in a highly pure state. The configuration of both isomers was determined by means of UV/VIS, NMR, and CD spectroscopy.
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Molnár et al. (1996) studied this question.
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