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棉子糖

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棉子糖
IUPAC名
(2R,3R,4S,5S,6R)-2-[(2S,3S,4S,5R)-3,4- Dihydroxy-2,5-bis(hydroxymethyl)
oxolan-2-yl]oxy-6-[ [(2S,3R,4S,5R,6R)-3,4,5-trihydroxy-6- (hydroxymethyl)oxan-2-yl]oxymethyl]
oxane-3,4,5-triol
别名 棉籽糖
蜜三糖
α-D-半乳糖-α-D-葡萄糖-β-D-果糖
识别
CAS号 512-69-6  checkY
17629-30-0(五水)  checkY[ECHA]
PubChem 439242
ChemSpider 388379
SMILES
 
  • C([C@@H]1[C@@H]([C@@H]([C@H]([C@H](O1)OC[C@@H]2[C@H]([C@@H]([C@H]([C@H](O2)O[C@]3([C@H]([C@@H]([C@H](O3)CO)O)O)CO)O)O)O)O)O)O)O
InChI
 
  • 1S/C18H32O16/c19-1-5-8(22)11(25)13(27)16(31-5)30-3-7-9(23)12(26)14(28)17(32-7)34-18(4-21)15(29)10(24)6(2-20)33-18/h5-17,19-29H,1-4H2/t5-,6-,7-,8+,9-,10-,11+,12+,13-,14-,15+,16+,17-,18+/m1/s1
InChIKey MUPFEKGTMRGPLJ-ZQSKZDJDBO
ChEBI 16634
性质
化学式 C18H32O16
摩尔质量 504.42 g·mol⁻¹
若非注明,所有数据均出自标准状态(25 ℃,100 kPa)下。

棉子糖(英語:Raffinose,也称棉籽糖蜜三糖。结构式为:α-D-半乳糖-α-D-葡萄糖-β-D-果糖)是主要存在于棉子和甜菜中一种非还原性三糖,在所有三糖中与人类的关系较大,因为棉子饼可被用作饲料油料,甜菜主要用于制造蔗糖,都是常见的农作物。α-半乳糖激酶(α-GAL)可以将棉子糖水解为蔗糖半乳糖,这在工业生产中可被用来提高甜菜的产蔗糖量。人体消化道没有这种酶,因而无法水解利用棉子糖。棉子糖进入人体结肠后,被产气菌酵解利用,产生肠气。这也是吃豆类(富含棉子糖)会有肠气的原因。[1]

棉子糖可由棉籽饼磨粉水解甜菜糖蜜制得。[1]

棉子糖作为一种低聚糖,可服用以调节肠道菌群。[1]

参考文献

  1. ^ 1.0 1.1 1.2 Storey B., Noiles, E., Thompson, K. Comparison of Glycerol, Other Polyols, Trehalose, and Raffinose to Provide a Defined Cryoprotectant Medium for Mouse Sperm Cryopreservation. Cryobiology. 1998, 37 (1): 46–58. PMID 9698429. doi:10.1006/cryo.1998.2097. 
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棉子糖
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