Three new triterpenes from the resinous bark of Protium kleinii and their antinociceptive activity
Three novel pentacyclic triterpenes have been isolated from the resin of Protium kleinii and their structures elucidated by NMR spectroscopy as 3-oxo-11beta,16beta-dihydroxy-urs-12-ene (1), 3-oxo-11beta-hydroxy-urs-12-ene (2) and 3-oxo-11beta-hydroxy-olean-12-ene (3). The systemic administration of the above compounds (10-100 mg kg-1, i.p.) was able to inhibited both first and second phase of the formalin-induced nociception in mice. The known triterpenes 3beta,16beta-dihydroxy-olean-12-ene (brein) (4) and a mixture of alpha (5)- and beta-amyrin (6) were also found.
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Digital revista |
| Language: | English |
| Published: |
Sociedade Brasileira de Química
2005
|
| Online Access: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532005000400014 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|