Purification, characterisation and antioxidant properties of a novel polysaccharide from Physalis pubescens L. fruits was written by Gao, Pinyi;Zhang, Xingyue;Wang, Ziwei;Liu, Changfeng;Xu, Shuangshuang;Bian, Jun;Yue, Dandan;Li, Danqi;Zhang, Lixin;Liu, Xuegui. And the article was included in International Journal of Food Science and Technology in 2022.COA of Formula: C4H10O4 This article mentions the following:
Considering the medicinal and edible properties of Physalis pubescens L. fruit, the plant has a long history of cultivation in China. In the current study, a novel polysaccharide (PPL-1) was successfully obtained from P. pubescens fruits using multi-column techniques. The chem. characterization of the polysaccharide was achieved by acid hydrolysis, determination of weight average mol. mass, thermogravimetric and Smith degradation analyses, in addition to UV, Fourier transform IR spectroscopy, one- and two-dimensional NMR spectroscopy. According to the structural analyses, PPL-1 consisted of rhamnose, arabinose, fructose, mannose and glucose with a relative molar ratio of 0.39:0.12:0.02:0.03:0.44. The average mol. weight of PPL-1 was 7.3 kDa and it was mainly composed of (1 → 3) and (1 → 6) linkages. PPL-1 exhibited not only scavenging effects on 2,2-diphenyl-1-picrylhydrazyl and 2,2-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) free radicals but also hydrogen peroxide-induced oxidative stress in SH-SY5Y cells effectively by decreasing malondialdehyde content and increasing total antioxidant capacity, superoxide dismutase and glutathione peroxidase activity levels. In the experiment, the researchers used many compounds, for example, (2R,3S)-rel-Butane-1,2,3,4-tetraol (cas: 149-32-6COA of Formula: C4H10O4).
(2R,3S)-rel-Butane-1,2,3,4-tetraol (cas: 149-32-6) belongs to alcohols. Under appropriate conditions, inorganic acids also react with alcohols to form esters. To form these esters, a wide variety of specialized reagents and conditions can be used. Converting an alcohol to an alkene requires removal of the hydroxyl group and a hydrogen atom on the neighbouring carbon atom. Dehydrations are most commonly carried out by warming the alcohol in the presence of a strong dehydrating acid, such as concentrated sulfuric acid.COA of Formula: C4H10O4
Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts