Ergostane

Ergostane is a tetracyclic triterpene, also known as 24S-methylcholestane. The compound itself has no known uses;^{[citation needed]} however various functionalized analogues are produced by plants and animals. The most important of these are the heavily derivatised withanolides.^[1][2] However simpler forms do exist, such as the sterane campestane (24R-methylcholestane). Along with cholestane and stigmastane, this sterane is used as a biomarker for early eukaryotes.^[3]

Ergostane

Names
IUPAC name Ergostane
Systematic IUPAC name (1R,3aS,3bR,5aΞ,9aS,9bS,11aR)-1-[(2R,5S)-5,6-Dimethylheptan-2-yl]-9a,11a-dimethylhexadecahydro-1H-cyclopenta[a]phenanthrene
Identifiers
CAS Number	25318-39-2 511-20-6 (5α)-ergostane
3D model (JSmol)	Interactive image (5α)-ergostane: Interactive image
ChemSpider	144332 (5α)-ergostane
PubChem CID	6857535 164641 (5α)-ergostane
UNII	Y0XC723P4C (5α)-ergostane Y
CompTox Dashboard (EPA)	DTXSID70948162
InChI InChI=1S/C28H50/c1-19(2)20(3)10-11-21(4)24-14-15-25-23-13-12-22-9-7-8-17-27(22,5)26(23)16-18-28(24,25)6/h19-26H,7-18H2,1-6H3/t20-,21+,22+,23-,24+,25-,26-,27-,28+/m0/s1 Key: WAAWMJYYKITCGF-WTPIMUJOSA-N InChI=1S/C28H50/c1-19(2)20(3)10-11-21(4)24-14-15-25-23-13-12-22-9-7-8-17-27(22,5)26(23)16-18-28(24,25)6/h19-26H,7-18H2,1-6H3/t20-,21+,22?,23-,24+,25-,26-,27-,28+/m0/s1 Key: WAAWMJYYKITCGF-ADGVWNIHSA-N
SMILES C[C@H](CC[C@H](C)C(C)C)[C@H]1CC[C@@H]2[C@@]1(CC[C@H]3[C@H]2CCC4[C@@]3(CCCC4)C)C (5α)-ergostane: C[C@H](CC[C@H](C)C(C)C)[C@H]1CC[C@@H]2[C@@]1(CC[C@H]3[C@H]2CC[C@@H]4[C@@]3(CCCC4)C)C
Properties
Chemical formula	C28H50
Molar mass	386.708 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

See also

• Cholane
• Cholestane
• Lanostane