https://wiki.tiffa.net/w/index.php?action=history&feed=atom&title=Previtamin_D3%2Fen Previtamin D3/en - Revision history 2026-04-19T04:38:40Z Revision history for this page on the wiki MediaWiki 1.43.0 https://wiki.tiffa.net/w/index.php?title=Previtamin_D3/en&diff=137461&oldid=prev FuzzyBot: Updating to match new version of source page 2024-04-11T10:26:30Z <p>Updating to match new version of source page</p> <p><b>New page</b></p><div>&lt;languages /&gt;<br /> {{DISPLAYTITLE:Previtamin D&lt;sub&gt;3&lt;/sub&gt;}}<br /> {{Chembox<br /> | Name = Previtamin D&lt;sub&gt;3&lt;/sub&gt;<br /> | ImageFile = Previtamin D3.svg<br /> | ImageFile_Ref = {{Chemboximage|correct|??}}<br /> | ImageName = Stereo skeletal formula of previtamin D&lt;sub&gt;3&lt;/sub&gt; ((1R)-1-ol, (Z)-en, (1R,3aR,7aR)-7a-meth,-1-hept,-3a-hydro, (2R)-2-yl)<br /> | IUPACName = (3&#039;&#039;S&#039;&#039;,6&#039;&#039;Z&#039;&#039;)-9,10-Secocholesta-5(10),6,8-trien-3-ol<br /> | SystematicName = (1&#039;&#039;S&#039;&#039;)-4-Methyl-3-[(&#039;&#039;Z&#039;&#039;)-2-&lt;nowiki/&gt;{(1&#039;&#039;R&#039;&#039;,3a&#039;&#039;R&#039;&#039;,7a&#039;&#039;R&#039;&#039;)-7a-methyl-1-[(2&#039;&#039;R&#039;&#039;)-6-methylheptan-2-yl]-2,3,3a,6,7,7a-hexahydro-1&#039;&#039;H&#039;&#039;-inden-4-yl}ethen-1-yl]cyclohex-3-en-1-ol<br /> | OtherNames = Previtamin D&lt;sub&gt;3&lt;/sub&gt;<br /> |Section1={{Chembox Identifiers<br /> | CASNo = 1173-13-3<br /> | CASNo_Ref = {{cascite|correct|CAS}}<br /> | CASNo1 = 17592-07-3<br /> | CASNo1_Ref = {{cascite|correct|CAS}}<br /> | UNII_Ref = {{fdacite|correct|FDA}}<br /> | UNII = HDA46400N5<br /> | UNII1_Ref = {{fdacite|correct|FDA}}<br /> | UNII1 = 6RR0I9PK8W<br /> | PubChem = 86590<br /> | PubChem1 = 6178113<br /> | PubChem1_Comment = &lt;small&gt;(&#039;&#039;E&#039;&#039;)-en&lt;/small&gt;<br /> | PubChem2 = 25245851<br /> | PubChem2_Comment = &lt;small&gt;(1&#039;&#039;S&#039;&#039;)-1-ol, (&#039;&#039;Z&#039;&#039;)-en, (2&#039;&#039;R&#039;&#039;)-2-yl&lt;/small&gt;<br /> | PubChem3 = 11485943<br /> | PubChem3_Comment = &lt;small&gt;(1&#039;&#039;S&#039;&#039;)-1-ol, (&#039;&#039;E&#039;&#039;)-en, (1&#039;&#039;R&#039;&#039;,7a&#039;&#039;R&#039;&#039;)-7a-meth,-1-hept, (2&#039;&#039;R&#039;&#039;)-2-yl&lt;/small&gt;<br /> | PubChem4 = 11199982<br /> | PubChem4_Comment = &lt;small&gt;(1&#039;&#039;S&#039;&#039;)-1-ol, (&#039;&#039;Z&#039;&#039;)-en, (1&#039;&#039;R&#039;&#039;,7a&#039;&#039;R&#039;&#039;)-7a-meth,-1-hept, (2&#039;&#039;R&#039;&#039;)-2-yl&lt;/small&gt;<br /> | ChemSpiderID = 78098<br /> | ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}<br /> | ChemSpiderID1 = 4832524<br /> | ChemSpiderID1_Ref = {{chemspidercite|correct|chemspider}}<br /> | ChemSpiderID1_Comment = &lt;small&gt;(&#039;&#039;E&#039;&#039;)-en&lt;/small&gt;<br /> | ChemSpiderID2 = 9660762<br /> | ChemSpiderID2_Ref = {{chemspidercite|correct|chemspider}}<br /> | ChemSpiderID2_Comment = &lt;small&gt;(1&#039;&#039;S&#039;&#039;)-1-ol, (&#039;&#039;E&#039;&#039;)-en, (1&#039;&#039;R&#039;&#039;,7a&#039;&#039;R&#039;&#039;)-7a-meth,-1-hept, (2&#039;&#039;R&#039;&#039;)-2-yl&lt;/small&gt;<br /> | ChemSpiderID3 = 9375051<br /> | ChemSpiderID3_Ref = {{chemspidercite|correct|chemspider}}<br /> | ChemSpiderID3_Comment = &lt;small&gt;(1&#039;&#039;S&#039;&#039;)-1-ol, (&#039;&#039;Z&#039;&#039;)-en, (1&#039;&#039;R&#039;&#039;,7a&#039;&#039;R&#039;&#039;)-7a-meth,-1-hept, (2&#039;&#039;R&#039;&#039;)-2-yl&lt;/small&gt;<br /> | EINECS = 241-561-3<br /> | MeSHName = Previtamin+D(3)<br /> | SMILES = CC(C)CCCC(C)C1CCC2C(C=CC3=C(C)CCC(O)C3)=CCCC12C<br /> | StdInChI = 1S/C27H44O/c1-19(2)8-6-9-21(4)25-15-16-26-22(10-7-17-27(25,26)5)12-13-23-18-24(28)14-11-20(23)3/h10,12-13,19,21,24-26,28H,6-9,11,14-18H2,1-5H3<br /> | StdInChI_Ref = {{stdinchicite|correct|chemspider}}<br /> | StdInChIKey = YUGCAAVRZWBXEQ-UHFFFAOYSA-N<br /> | StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}<br /> }}<br /> |Section2={{Chembox Properties<br /> | C=27 | H=44 | O=1 <br /> }}<br /> }}<br /> &#039;&#039;&#039;Previtamin D&lt;sub&gt;3&lt;/sub&gt;&#039;&#039;&#039; is an intermediate in the production of [[cholecalciferol]] ([[vitamin D]]&lt;sub&gt;3&lt;/sub&gt;). <br /> <br /> 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.<br /> <br /> 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]].<br /> <br /> The synthesis of previtamin D&lt;sub&gt;3&lt;/sub&gt; is blocked effectively by [[sunscreens]].<br /> <br /> == Interactive pathway map==<br /> {{VitaminDSynthesis_WP1531|highlight=Previtamin_D3}}<br /> <br /> {{Vitamin}}<br /> <br /> {{二次利用|date=20 November 2023}}<br /> [[Category:Vitamin D]]<br /> [[Category:Secosteroids]]<br /> [[Category:Indanes]]</div> FuzzyBot