Calcitroic acid

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Calcitroic acid
Calcitroic acid.png
CAS number 71204-89-2
PubChem 6443842
ChemSpider 4947800
Jmol-3D images Image 1
Molecular formula C23H34O4
Molar mass 374.514
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Calcitroic acid (1α-hydroxy-23-carboxy-24,25,26,27-tetranorvitamin D3) is a metabolite of 1α,25-dihydroxyvitamin D3 (calcitriol). Its formation is catalyzed by the enzyme calcitriol 24-hydroxylase.[1] Calcitroic acid is soluble in water and excreted in bile.[2]


  1. ^ Sakaki T, Kagawa N, Yamamoto K, Inouye K (January 2005). "Metabolism of vitamin D3 by cytochromes P450". Front. Biosci. 10: 119–34. PMID 15574355. 
  2. ^ Ross AC, Caballero B, Cousins RJ, Tucker KL, Ziegler TR. Modern nutrition in health and disease. 11. ed, Baltimore: Lippincott Williams & Wilkins 2014.