21-降胆甾烷

21-降胆甾烷
	IUPAC名; (8S,9S,10S,13R,14S,17S)-10,13-dimethyl-17-(5-methylhexyl)-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene
	系统名; (1S,2S,10S,11S,14S,15R)-2,15-dimethyl-14-(5-methylhexyl)tetracyclo[8.7.0.02,7.011,15]heptadecane; (1S,2S,10S,11S,14S,15R)-2,15-二甲基-14-(5-甲基己基)四环[8.7.0.02,7.011,15]十七烷
识别
CAS号	188740-35-4
PubChem	15807965; 135072882（(5α)-21-Norcholestane）
SMILES	CC(C)CCCC[C@H]1CC[C@@H]2[C@@]1(CC[C@H]3[C@H]2CCC4[C@@]3(CCCC4)C)C;
InChI	1S/C26H46/c1-19(2)9-5-6-10-21-13-15-23-22-14-12-20-11-7-8-17-25(20,3)24(22)16-18-26(21,23)4/h19-24H,5-18H2,1-4H3/t20?,21-,22-,23-,24-,25-,26+/m0/s1;
InChIKey	NJAGGVRNPGTXRG-ALEVNZSUSA-N
性质
化学式	C26H46
摩尔质量	358.64 g·mol−1
	若非注明，所有数据均出自标准状态（25 ℃，100 kPa）下。

21-降胆甾烷（英语：21-Norcholestane，或称为21-去甲胆甾烷，17β-异辛基雄烷，17β-Isoheptylandrostane）是一种26碳的甾烷类化合物，可在第三纪的湖泊沉积物中发现^[1]。

另见

^ Bao JP, Li MW. Unprecedented occurrence of novel C26–C28 21-norcholestanes and related triaromatic series in evaporitic lacustrine sediments. Organic Geochemistry. 2001, 32 (8): 1031–1036. PMID 27494664. doi:10.1016/S0146-6380(01)00060-2.