Chemistry:27-Norcholestane

27-Norcholestane

Names
IUPAC name (8R,9S,10S,13R,14S,17R)-17-[(2R)-heptan-2-yl]-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene
Identifiers
CAS Number	134521-86-1 Y
3D model (JSmol)	Interactive image
ChemSpider	65791227
PubChem CID	53954564
InChI InChI=1S/C26H46/c1-5-6-7-10-19(2)22-14-15-23-21-13-12-20-11-8-9-17-25(20,3)24(21)16-18-26(22,23)4/h19-24H,5-18H2,1-4H3/t19-,20?,21+,22-,23+,24+,25+,26-/m1/s1 Key: JGTJUUFDASCIKN-LBSJJPSCSA-N
SMILES CCCCC[C@@H](C)[C@H]1CC[C@@H]2[C@@]1(CC[C@H]3[C@H]2CCC4[C@@]3(CCCC4)C)C
Properties
Chemical formula	C26H46
Molar mass	358.654 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

Tracking categories (test):

• SizeSet

27-Norcholestane, is a chemical compound with formula C₂₆H₄₆, that is a steroid derivative. 27-Norcholestane is used as a biomarker to constrain the source age of sediments and petroleum through the ratio between 24-norcholestane and 27-norcholestane (norcholestane ratio, NCR), especially when used with other age diagnostic biomarkers, like oleanane.

See also

• Biomarker
• Cholestane
• Nor-