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Further dihydrochalcone C-glycosides from the fruit of Averrhoa carambola.
- Source :
-
LWT - Food Science & Technology . Jan2016, Vol. 65, p604-609. 6p. - Publication Year :
- 2016
-
Abstract
- Further study on the chemical constituents present in the fruit of Averrhoa carambola L. (Oxalidaceae), commonly called star fruit or carambola, led to the isolation of six new dihydrochalcone C -glycosides, carambolasides E∼J ( 1 ∼ 6 ). Their structures were determined by spectroscopic and chemical methods, including low temperature nuclear magnetic resonance (NMR). Compounds 1 ∼ 6 and two alkaline hydrolysates, 5a and 6a , exhibited more potent 2,2′-azino-bis(3-ethylbenzthiazoline-6-sulphonic acid) radical cation (ABTS + ) scavenging activity with IC 50 values ranging from 4.52 to 2.54 μM than l -ascorbic acid (14.21 μM). However, they were inactive in scavenging 1,1-diphenyl-2-picrylhydrazyl radical (DPPH ) and in ferric reducing antioxidant power (FRAP). [ABSTRACT FROM AUTHOR]
- Subjects :
- *AVERRHOA
*GLYCOSIDES
*CARAMBOLA
*OXALIDACEAE
*DIHYDROCHALCONES
Subjects
Details
- Language :
- English
- ISSN :
- 00236438
- Volume :
- 65
- Database :
- Academic Search Index
- Journal :
- LWT - Food Science & Technology
- Publication Type :
- Academic Journal
- Accession number :
- 110533849
- Full Text :
- https://doi.org/10.1016/j.lwt.2015.08.061