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One new pyrroline compound from Callistemon viminalis (Sol. Ex Gaertner) G.Don Ex Loudon.
MedLine Citation:
PMID:  22967219     Owner:  NLM     Status:  Publisher    
One new compound: 3,4-dihydro-2-(hydroxymethyl)-4-methyl-2H-pyrrol-2-ol (5) was isolated from the fruits and bark of Callistemon viminalis along with the known compounds lupeol (1), octacosanol (2), β-sitosterol (3), betulin (4), betulinic acid (6), ursolic acid (7), corosolic acid (8), β-sitosterol-3-O-β-D-glucoside (9), methyl gallate (10), gallic acid (11), catechin (12), ellagic acid (13) and 3-O-acetylursolic acid (14) (compound 14 was isolated from the bark and not detected in the fruits). Structures of these compounds were elucidated on the basis of their spectroscopic data (NMR, MS, IR spectra and COSY and HR-MS for 5a). The antioxidant activity of the total extracts, petroleum ether, CH(2)Cl(2) and EtOAc fractions together with the compounds 6, 7, 9, 10, 11, 12 and 13 was comparable with that of the standard antioxidant, ascorbic acid.
A A Gohar; G T Maatooq; S R Gadara; W S Aboelmaaty
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-9-11
Journal Detail:
Title:  Natural product research     Volume:  -     ISSN:  1478-6427     ISO Abbreviation:  Nat. Prod. Res.     Publication Date:  2012 Sep 
Date Detail:
Created Date:  2012-9-12     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101167924     Medline TA:  Nat Prod Res     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
a Pharmacognosy Department, Faculty of Pharmacy , Mansoura University , Mansoura 35516 , Egypt.
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