Phenolic quantification and botanical origin of Portuguese propolis

- The phenolic quantification of Portuguese propolis was achieved by HPLC.
- The phenolic composition of Populus x Canadensis Moench buds and Cistus ladanifer L. resin was evaluated by LC-MS/MS.
- Populus spp. and Cistus ladanifer were establish as two main floral sources for Portuguese propolis.
- Kaempferol-3,7-dimethyl-ether is a possible marker compound for discrimination of for Cistus propolis.