I have isolated compounds and think they are amber bolin and lipidiol but can't have access to the published data (several papers by Gonzalez et al. in spanish journal).
You can attached your NMR sample to see what can we do. May I can help.
Mr.Amani You can attached your NMR charts sample to see what can we do. May we can help.
Thank you Alaa for your offer. I'm almost sure of the identity of the compounds but wanted to have a look at the published data which are fairly old and published in a Spanish journal. I included the details of these publications if you can have access to them.
1-Gonzalez, A.G., Bermejo, J., Breton, J.L., Betancor, C., 1967. Amberboin, a new
sesquiterpene lactone from Amberboa lippii D.C.. An. Quim. 63, 965–966.
2- Gonzalez, A.G., Garcia Marrero, B., Breton, J.L., 1970. Terpenoides de las Compuestas.X. Estructura de la grosshemina, lipidiol, e isolipidiol. Lactonas de la Ambrerboa (Centaurea) lippii DC e su posible estereoquimica. An. Quim. 66, 799–813.
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