Eschscholtzxanthin : a New Xanthophyll from the Petals of the California Poppy, Esch- Scholtzia Californica
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چکیده
Esters of a hitherto undescribed xanthophyll, now called eschscholtzxanthin, are the principal constituents of the pigment mixture found in the brilliant, golden yellow petals of the California poppy, Eschscholtxia calijornica (l-3) .l Free eschscholtzxanthin, obtained by saponifktion of the esters, has the empirical formula G0H51*~02. The eschscholtzxanthin molecule contains twelve double bonds, probably in a single conjugated system, and two hydroxyl groups. Various synthetic esters of eschscholtzxanthin exhibit great variations in optical rotat,ion; yet the wave-lengths of the absorption maxima of the esters and of the eschscholtzxanthin itself are identical when measured in the same solvents (Tables I and II).
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