Xanthones and Phenylcoumarins from Kielmeyera pumila.
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Data
1988
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Resumo
In continuation of our studies on extracts of the Guttiferae
family we have examined the stems and fruit of
Kielmeyera pumila Pohl, collected in the region of Ouro
Preto, State of Minas Gerais, from a specimen identified
by the botanist Jo& Badini (Herb. Prof. JosC Badini,
Universidade Federal de Ouro Preto, Minas Gerais,
Brazil).
Several species of this genus has been shown to contain
xanthones [l]. Investigation of the stems of the K. pumih
has yielded, besides sitosterol, two previously known
xanthones (osajaxanthone [Z] and 6-deoxyjacareubin
[3]) and two known phenylcoumarins, the 1,2-dihydro-5-
hydroxy-2-(l-hydroxy-l-methylethyl)-4-(3-methylbutyryl)-
6-phenyl-furo [2,3-h] [l] benzopyran-8-one [4] and
mammeigin (1) [S].
The fruit of the same plant yielded friedelin, a-amyrin,
shikimic acid, mammeigin and an isomer of mammeigin
to which we have given the trivial name isomammeigin
(2).
Descrição
Palavras-chave
Guttiferae, Pyranoxanthones, Phenylcoumarins, Isomammeigin
Citação
NAGEM, T. J; SILVA, M. de A. e. Xanthones and Phenylcoumarins from Kielmeyera pumila. Phytochemistry, London, v. 27, n.9, p. 2961-2962, 1988. Disponível em: <http://www.sciencedirect.com/science/article/pii/0031942288806964>. Acesso em: 10 jan. 2017.