dc.creatorFrighetto N.
dc.creatorWelendorf R.M.
dc.creatorPereira da Silva A.M.
dc.creatorNakamura M.J.
dc.creatorSiani A.C.
dc.date2005
dc.date2015-06-26T14:08:02Z
dc.date2015-11-26T14:07:35Z
dc.date2015-06-26T14:08:02Z
dc.date2015-11-26T14:07:35Z
dc.date.accessioned2018-03-28T21:08:15Z
dc.date.available2018-03-28T21:08:15Z
dc.identifier
dc.identifierPhytochemical Analysis. , v. 16, n. 6, p. 411 - 414, 2005.
dc.identifier9580344
dc.identifier10.1002/pca.860
dc.identifierhttp://www.scopus.com/inward/record.url?eid=2-s2.0-28244450307&partnerID=40&md5=833fcee35c86bd1db0c85d277aaa227f
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/93487
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/93487
dc.identifier2-s2.0-28244450307
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1240816
dc.descriptionA high yield of betulinic acid (up to 17% from the ethanolic extract) was found in the leaves of Eugenia florida collected in south-eastern Brazil, making this species a potential commercial source of the title compound. Extracts of E. florida were subjected to solvent partition, and rapid high-speed counter-current chromatography (HSCCC) was applied to the semi-crude extracts to afford betulinic acid in high purity. The mobile and stationary phases were derived from the two-phase solvent system composed of n-hexane-ethyl acetate-methanol-water (10:5:2.5:1). The developing solvent system (stationary and mobile phases) for optimum HSCCC separation was chosen by dissolving the fraction to be chromatographed in the proposed solvent mixture and determining the amount of betulinic acid in each phase by densitometric TLC. Purified betulinic acid was characterized by 13C-NMR, GC-MS and co-injection of its methyl ester with standards in GC-FID. The HSCCC technique is commonly employed to isolate triterpene glycosides, but is applied in this study to an aglycone. Copyright © 2005 John Wiley & Sons, Ltd.
dc.description16
dc.description6
dc.description411
dc.description414
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dc.languageen
dc.publisher
dc.relationPhytochemical Analysis
dc.rightsfechado
dc.sourceScopus
dc.titlePurification Of Betulinic Acid From Eugenia Florida (myrtaceae) By High-speed Counter-current Chromatography
dc.typeArtículos de revistas


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