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. 2021 Jun 18;10(6):978. doi: 10.3390/antiox10060978

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Chromatograms of propolis extracts; (A) EEP, (B) Pg-EP, with representative markers of activity: (1) caffeic acid, (2) p-coumaric acid, (3) trans-ferulic acid, (4) trans-cinnamic acid, (5) kaempferol, (6) apigenin, (7) pinocembrin, (8) chrysin, (9) CAPE, (10) galangin.