Article Sidebar
Published:
Oct 29, 2013Keywords:
Article Details
Submission of a manuscript to this journal is a representation that the manuscript has not been published previously and is not under consideration for publication elsewhere.
All authors named in each manuscript would be required to sign a form (to be supplied by the Editor) so that they may retain their copyright in the article but to assign to us (the Publishers) and its licensees in perpetuity, in all forms, formats and media (whether known or created in the future) to (i) publish, reproduce, distribute, display and store the contribution, (ii) translate the contribution into other languages, create adaptations, reprints, include within collections and create summaries, extracts and/or abstracts of the contribution, (iii) create any other derivative works(s) based on the contribution, (iv) to exploit all subsidiary rights in the contribution, (v) the inclusion of electronic links from the contribution to third party material where-ever it may be located, and (vi) license any thrid party to do any or all of the above.
Main Article Content
Isolation of Antidiabetic Principle from <i>Bougainvillea spectabilis</i> Willd (Nyctaginaceae) Stem Bark
Abstract
Purpose: To isolate and identify the constituents of Bougainvillea spectabilis Willd (Nyctaginaceae) stem bark.
Methods: The methanol extract of Bougainvillea spectabilis stem bark powder was suspended in water and extracted with dichloromethane (CH2Cl2), ethyl acetate (EtOAc), and butanol (BuOH) successively. The ethyl acetate fraction was loaded in a column packed with silica gel and eluted with a gradient of chloroform (CHCl3): methanol (MeOH), and water yielded five fractions (A - E). Chemical constituents were isolated by repeated column chromatography of these fractions.
Results: Column chromatography of fractions B and C afforded four compounds identified as pinitol, β-sitosterol, quercetin and quercetin-3-O-α-L-rhamnopyranoside. For the first time, pinitol, β-sitosterol, quercetin and quercetin-3-O-α-L-rhamnopyranoside were isolated from the stem bark of B. spectabilis Willd.
Conclusion: An antidiabetic principle, pinitol, was successfully isolated from the stem bark of B. spectabilis Willd.
Keywords: Bougainvillea spectabilis, Column chromatography, Pinitol, Quercetin, Quercetin-3-O-α-Lrhamnopyranoside.
