阿拉伯糖



















































阿拉伯糖



IUPAC名
(2R,3S,4S)-2,3,4,5-Tetrahydroxypentanal
L-(+)-树胶醛糖：(2R,3S,4S)-2,3,4,5-四羟基戊醛
D-(-)-树胶醛糖：(2S,3R,4R)-2,3,4,5-四羟基戊醛
识别

CAS号
5328-37-0（(L)）  ✗
147-81-9  ✓
10323-20-3（(D)）  ✗

PubChem
5460291

ChemSpider
59687

SMILES


InChI


InChIKey
PYMYPHUHKUWMLA-WDCZJNDABW

ChEBI
46983
性质

化学式
C5H10O5

摩尔质量
 150.131 g·mol⁻¹

密度
 1.63
若非注明，所有数据均出自一般条件（25 ℃，100 kPa）下。

阿拉伯糖，又称树胶醛糖、果胶糖，是一种戊醛糖：含有5个碳原子并且带有醛基的单糖。分子式C5H10O5，分子量150.131。阿拉伯糖因最早分离自阿拉伯胶中而得名[1]。


阿拉伯糖有8种立体异构体，常见的为β-L-阿拉伯糖（CAS号：87-72-9，比旋光度：+190.5°→+104.5°）和β-D-阿拉伯糖（CAS号：10323-20-3，比旋光度：-175°→-108°）。天然的L-阿拉伯糖广泛存在于食物中，通常与其他单糖结合，以杂多糖的形式存在于胶质、半纤维素、果胶酸、细菌多糖及某些糖苷中。D-阿拉伯糖通常由人工合成而得，在自然界很少见，偶见于某些大肠杆菌或结核杆菌的细胞内。





























  1. ^ Merriam Webster Dictionary




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