Previtamin D3: Difference between revisions
Previtamin D3
Created page with "{{DISPLAYTITLE:Previtamin D<sub>3</sub>}} {{Chembox | Name = Previtamin D<sub>3</sub> | ImageFile = Previtamin D3.svg | ImageFile_Ref = {{Chemboximage|correct|??}} | ImageName = Stereo skeletal formula of previtamin D<sub>3</sub> ((1R)-1-ol, (Z)-en, (1R,3aR,7aR)-7a-meth,-1-hept,-3a-hydro, (2R)-2-yl) | IUPACName = (3''S'',6''Z'')-9,10-Secocholesta-5(10),6,8-trien-3-ol | SystematicName = (1''S'')-4-Methyl-3-[(''Z'')-2-<nowiki/>{(1''R'',3a''R'',7a''R'')-7a-methyl-1-[(2''R''..." |
Marked this version for translation |
||
| (One intermediate revision by the same user not shown) | |||
| Line 1: | Line 1: | ||
<languages /> | |||
<translate> | |||
<!--T:1--> | |||
{{DISPLAYTITLE:Previtamin D<sub>3</sub>}} | {{DISPLAYTITLE:Previtamin D<sub>3</sub>}} | ||
{{Chembox | {{Chembox | ||
| Line 51: | Line 54: | ||
'''Previtamin D<sub>3</sub>''' is an intermediate in the production of [[cholecalciferol]] ([[vitamin D]]<sub>3</sub>). | '''Previtamin D<sub>3</sub>''' is an intermediate in the production of [[cholecalciferol]] ([[vitamin D]]<sub>3</sub>). | ||
<!--T:2--> | |||
It is formed by the action of [[UV light]], most specifically UVB light of wavelengths between 295 and 300 nm, acting on [[7-dehydrocholesterol]] in the [[epidermis_(skin)|epidermal layers]] of the skin. | It is formed by the action of [[UV light]], most specifically UVB light of wavelengths between 295 and 300 nm, acting on [[7-dehydrocholesterol]] in the [[epidermis_(skin)|epidermal layers]] of the skin. | ||
<!--T:3--> | |||
The B ring of the [[steroid]] nucleus structure is broken open, making a [[secosteroid]]. This then undergoes spontaneous [[isomerization]] into cholecalciferol, the [[prohormone]] of the active form of vitamin D, [[calcitriol]]. | The B ring of the [[steroid]] nucleus structure is broken open, making a [[secosteroid]]. This then undergoes spontaneous [[isomerization]] into cholecalciferol, the [[prohormone]] of the active form of vitamin D, [[calcitriol]]. | ||
<!--T:4--> | |||
The synthesis of previtamin D<sub>3</sub> is blocked effectively by [[sunscreens]]. | The synthesis of previtamin D<sub>3</sub> is blocked effectively by [[sunscreens]]. | ||
<!--T:5--> | |||
== Interactive pathway map== | == Interactive pathway map== | ||
{{VitaminDSynthesis_WP1531|highlight=Previtamin_D3}} | {{VitaminDSynthesis_WP1531|highlight=Previtamin_D3}} | ||
<!--T:6--> | |||
{{Vitamin}} | {{Vitamin}} | ||
<!--T:7--> | |||
{{二次利用|date=20 November 2023}} | {{二次利用|date=20 November 2023}} | ||
[[Category:Vitamin D]] | [[Category:Vitamin D]] | ||
[[Category:Secosteroids]] | [[Category:Secosteroids]] | ||
[[Category:Indanes]] | [[Category:Indanes]] | ||
</translate> | |||