Planta Med 2007; 73(6): 599-602
DOI: 10.1055/s-2007-967202
Natural Product Chemistry
Letter
© Georg Thieme Verlag KG Stuttgart · New York

Phenolic Constituents in Dried Flowers of Aloe vera (Aloe barbadensis) and their in vitro Antioxidative Capacity

Shirin Keyhanian1 , Elisabeth Stahl-Biskup1
  • 1Institute of Pharmacy, Division of Pharmaceutical Biology and Microbiology, University of Hamburg, Hamburg, Germany
Further Information

Publication History

Received: February 9, 2007 Revised: April 4, 2007

Accepted: April 13, 2007

Publication Date:
22 May 2007 (eFirst)

Abstract

The dried flowers from Aloe vera (L.) Burm. f. (Aloe barbadensis Mill.) (Asphodelaceae) were analysed by means of HPLC-DAD and HPLC-MS/MS, verifying chlorogenic, caffeic, 5-p-coumaroylquinic, caffeoylshikimic, 5-feruloylquinic, 5-p-cis-coumaroylquinic, p-coumaric and ferulic acid as well as luteolin, apigenin, quercetin, kaempferol, isoorientin, isovitexin and their 7-O-glucosides, saponarin and lutonarin. On searching for anthranoids in the flower extract, aloe-emodin as well as the glycosylchromone aloeresin B could be identified. Aloin A and B, the laxative principle of the drug Curaçao-Aloes, are not accumulated in the dried flowers. The polyphenol content of three different batches was 0.73 - 1.01 % (± 0.05 %) and the flavonoid content 0.24 - 0.34 % (± 0.01 %). The hydrophilic antioxidative capacity amounted to 85.7 - 94.9 (± 0.5) μmol TEAC/g dried Aloe vera flower and was directly correlated with the polyphenol and flavonoid contents.

References

Prof. Dr. Elisabeth Stahl-Biskup

Institute of Pharmacy

Division of Pharmaceutical Biology and Microbiology

University of Hamburg

Bundesstrasse 45

20146 Hamburg

Germany

Phone: +49-40-42838-3896

Fax: +49-40-42838-3895

Email: elisabeth.stahl-biskup@uni-hamburg.de