. Carotenoids, their comparative biochemistry. Carotenoids. CAROTENOIDS retinene (vitamin A aldehyde), ^ ^ vitamin A ethers, 22-24 ^nd vitamin A acid, 2»- 2' are all active. The position of the hydrocarbon corresponding to vitamin A (so called axerophthene) is not settled ; Karrer and Benz'" claim it is active whilst Meunier and his associates state that it is inactive. 2 9,3 0 Me Me. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the or
. Carotenoids, their comparative biochemistry. Carotenoids. CAROTENOIDS retinene (vitamin A aldehyde), ^ ^ vitamin A ethers, 22-24 ^nd vitamin A acid, 2»- 2' are all active. The position of the hydrocarbon corresponding to vitamin A (so called axerophthene) is not settled ; Karrer and Benz'" claim it is active whilst Meunier and his associates state that it is inactive. 2 9,3 0 Me Me. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Goodwin, T. W. (Trevor Walworth). New York, Chemical Pub. Co.
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