24R-Calcipotriol (PRI 2202) is an impurity of Calcipotriol, a ligand of VDR-like receptors.

Impurity of Doxercalciferol is an impurity of doxercalciferol, a synthetic analog of ergocalciferol used as a drug for secondary hyperparathyroidism and metabolic bone disease, and it suppresses parathyroid synthesis.

ZK168281 is a 25-carboxylic ester 1α,25(OH)2D3 analog and a pure antagonist of VDR (Kd of 0.1 nM). ZK168281 is an effective inhibitor of the coactivator (CoA) interaction of its receptor.

Calcitetrol is the hormonally active form of vitamin D with three hydroxyl groups.

3-O-(2-Aminoethyl)-25-hydroxyvitamin D3 is a derivative of Vitamin D3.

Falecalcitriol is an analog of calcitriol. It has a higher potency both in vivo and in vitro systems, which is longer duration of action in vivo.

TEI-9648, a Vitamin D3 Lactone analogue, is a potent and specific vitamin D receptor (VDR) antagonist. TEI-9648 inhibits VDR/VDRE-mediated genomic actions of 1α,25(OH)2D3. TEI-9648 also inhibits HL-60 cell differentiation induced by of 1α,25(OH)2D3. TEI-9648 has the potential for bone metabolism research[1][2]. TEI-9648 (10-1000 nM) dose-dependently blocks the reciprocal changes of CD11b and CD71 expression associated with HL-60 cell differentiation induced by 1α,25(OH)2D3[1]. TEI-9648 has consistently weaker suppressive effect than TEI-9647[1]. TEI-9648 can not induce cell differentiation even after treatment at 1 μM in HL-60 cell[1]. TEI-9648 alone can not induce activation of NBT-reducing activity or α-NB esterase activity. In contrast, TEI-9648 markedly suppresses the up-regulation induced by 1α,25(OH)2D3 (0.1 nM) in HL-60 cells[1]. [1]. Miura D, et al. Antagonistic action of novel 1α,25-dihydroxyvitamin D3-26, 23-lactone analogs on differentiation of human leukemia cells (HL-60) i

1alpha, 25-Dihydroxy VD2-D6 is a deuterated form of vitamin D.

Calcitriol-D6 is the deuterated form of Calcitriol,which is the hormonally active form of vitamin D. Calcitriol (T6316) is the active metabolite of vitamin D3 that activates the vitamin D receptor.