The chemical Calcitriol has a designated molecular formula of C27H44O3 and a molecular weight of 416.646 g/mol. Synonyms may include: Calcitriolum [INN-Latin], CCRIS 5522, 1,25-DHCC, 1alpha,25-Dihydroxycholecalciferol, 1-alpha,25-Dihydroxycholecalciferol, 1,25-Dihydroxycholecaliferol, Dihydroxyvitamin D3, 1alpha,25-Dihydroxyvitamin D, 1,25-Dihydroxyvitamin D, 1-alpha,25-Dihydroxyvitamin D3, EINECS 250-963-8, HSDB 3482 (ChemID). Calcitriol has been assigned a MeSH pharmacological action of: Calcium Channel Agonist.