23,24,25-Trihydroxyvitamin D3, 24,25,26-trihydroxyvitamin D3, 24-keto-25-hydroxyvitamin D3, and 23-dehydro-25-hydroxyvitamin D3: new in vivo metabolites of vitamin D3 |
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Authors: | J K Wichmann H K Schnoes H F DeLuca |
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Abstract: | Four new in vivo metabolites of vitamin D3 were isolated from the blood plasma of chicks given large doses of vitamin D3. The metabolites were isolated by methanol-chloroform extraction and a series of chromatographic procedures. By use of mass spectrometry, ultraviolet absorption spectrophotometry, and specific chemical reactions, the metabolites were identified as 23,24,25-trihydroxyvitamin D3, 24,25,26-trihydroxyvitamin D3, 24-keto-25-hydroxyvitamin D3 and 23-dehydro-25-hydroxyvitamin D3. |
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