V. Bankova et al., ANTIBACTERIAL DITERPENIC ACIDS FROM BRAZILIAN PROPOLIS, Zeitschrift fur Naturforschung. C, A journal of biosciences, 51(5-6), 1996, pp. 277-280
Four labdane-type diterpenic acids and syringaldehyde were isolated an
d identified from Brazilian propolis. All the compounds exhibit antiba
cterial activity. The diterpenes, found for the first time in propolis
, are typical for some Araucaria species and thus indicate a possible
plant source of Brazilian propolis.