Studies on vitamin d (calciferol) and it
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William H. Okamura; Marcel R. Pirio
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Article
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1975
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Elsevier Science
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French
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Among steroid hormones, la,25-dihydroxyvitamin D3 (l), a metabolite and the presumed active form of vitamin D3 (z), is structurally unique. 3 Unlike the classical steroid hormones such as estrogen, aldosterone, testosterone, etc., the seco-steroid 1 lacks the B-ring. Recent 1 H NMR studies from th