Abstract
Three additional all- trans-carotenes, pigments A, and C and “tetrahydrolycopene”, one cis-isomer, pigment B, and a colorless polyene A have been isolated from fruit of tomatoes bred and selected for a high content of carotenes and colorless polyenes other than β-carotene and lycopene. Light-absorption curves, isomerization data, and relative adsorptive properties have been presented for each of these compounds. Some structural characteristics of the compounds have been deduced from the data obtained. The compound “unidentified I” has been identified as “protetrahydrolycopene” through iodine isomerization, mixed chromatograms, and light-absorption curves. This name should replace “poly- cis-ψ-carotene” and “unidentified carotene I”.
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