Secosteroids

Calcipotriol is a synthetic VitD₃ analogue with a high affinity for the vitamin D receptor.

Calcitriol is the most active metabolite of vitamin D and also a vitamin D receptor (VDR) agonist.

Vitamin D3 (Cholecalciferol; Colecalciferol) is a naturally occuring form of vitamin D. Vitamin D3 induces cell differentiation and prevents proliferation of cancer cells.

Calcifediol (25-hydroxy Vitamin D3) is an effective VDR ligand and VD supplement. Calcifediol is a prohormone of the vitamin D endocrine system (VDES) and is hydroxylated in the liver to produce the active form, calcitriol. Calcifediol can rapidly increase serum VD levels.

Paricalcitol, a vitamin D analogue, is a vitamin D receptor agonist, used for the prevention and treatment of secondary hyperparathyroidism (excessive secretion of parathyroid hormone) associated with chronic renal failure.

CB 966 a Vitamin D3 (HY-15398) analogue, is an immunosuppressant. CB 966 delays rejection of allogeneic skin grafts in mice. CB 966 moderately increases serum calcium levels. CB 966 can be used for the research of allogeneic skin graft rejection.

19-nor-1α,25-Dihydroxyvitamin D3 is a vitamin D receptor (VDR) agonist with an EC₅₀ of 4.8 nM. 19-nor-1α,25-Dihydroxyvitamin D3 binds to VDR and promotes gene transcription. 19-nor-1α,25-Dihydroxyvitamin D3 can be used in the research of diseases related to the vitamin D signaling pathway.

24-Oxo-25-hydroxyvitamin D3 is a vitamin D3 metabolite and an intermediate in the renal mitochondrial side-chain oxidation pathway. 24-Oxo-25-hydroxyvitamin D3 enhances intestinal calcium transport in rats. 24-Oxo-25-hydroxyvitamin D3 can be used in studies related to X-linked hypophosphatemic rickets.

Tachysterol 3 is a photoproduct of Previtamin D₃ (HY-130705). Previtamin D3 is an orally active, thermolabile steroidal compound that generates vitamin D3, as well as biologically inactive lumisterol and tachysterol. Previtamin D3 is synthesized in the skin of humans and rats via the UV-B-mediated photoconversion of 7-dehydrocholesterol. Previtamin D3 lacks direct anti-rachitic activity, and its in vivo activity relies on the vitamin D3 it produces. Previtamin D3 can be used in studies related to rickets and vitamin D metabolism.

Vitamin D2 (Ergocalciferol), drived from plant sources or dietary supplements, could be used as supplement of Vitamin D.

Alfacalcidol (1-hydroxycholecalciferol) is a vitamin D active metabolites, acts as a non-selective VDR activator medication, and widely be used in the management of osteoporosis.

Eldecalcitol (ED-71) is an orally active vitamin D3 analogue, inhibits bone resorption and increases bone mineral density. Eldecalcitol (ED-71) displays anti-tumor effect and inhibits cell proliferation, migration and induces apoptosis by suppressing GPx-1.

Calcipotriol monohydrate is a synthetic VitD3 analogue with a high affinity for the vitamin D receptor.

Secalciferol ((24R)-24,25-Dihydroxyvitamin D3) is the major active metabolite of Vitamin D. Secalciferol activates vitamin D receptor (VDR) with an EC₅₀ value of 150 nM. Secalciferol is involved in a wide range of biological functions such as calcium homeostasis, cellular differentiation and proliferation processes, as well as other functions related to the immune system, which is promising for research of rickets, osteomalacia, hypercalcemia and autoimmune disorders.

Ercalcidiol is a metabolite of vitamin D₂, is regarded as an indicator of vitamin D nutritional status.

Ercalcitriol (1α,25-Dihydroxy Vitamin D2) is a vitamin D receptor (VDR) agonist with high binding affinity. After binding to VDR, Ercalcitriol forms a complex with retinoid X receptor (RXR) to regulate target gene transcription. For example, Ercalcitriol induces human gingival/oral epithelial cells to produce human cat antimicrobial peptide (hCAP-18/LL-37), which has antimicrobial activity against periodontal pathogens such as Porphyromonas gingivalis. Ercalcitriol enhances the innate immune defense of the oral mucosa by promoting the expression of antimicrobial peptides, and is mainly used in the study of periodontal diseases and immune-related oral diseases.

Maxacalcitol (22-Oxacalcitriol), a vitamin D3 (HY-15398) analog, is an orally active VDR agonist. Maxacalcitol has a limited calcemic effect. Maxacalcitol has the potential for psoriasis and hyperparathyroidism research.

24,25-Dihydroxy VD2 (24,25-Dihydroxy vitamin D2) is a hydroxylated metabolite and derivative of Vitamin D2 HY-76542 (HY-76542).

Tacalcitol (1,24(R)-Dihydroxyvitamin D3; 1.alpha.,24R-Dihydroxyvitamin D3) can promote normal bone growth by regulating calcium ions. Tacalcitol inhibits cancer cell proliferation and migration. Tacalcitol can be used in the research of inflammation, cancer, and skin diseases.

Seocalcitol is a vitamin D analog, binds vitamin D receptor protein from human osteosarcoma MG-63 cells with K_d of 0.27 nM.