From: Alternative preparation of propolis extracts: comparison of their composition and biological activities
Compound, RT min.
W1
W2
A1
A2
EEP
Caffeic acid, 10.24 min
+
Trans-p-coumaric acid, 12.36 min
Ferulic acid, 12.90 min
Naringenin, 18.30 min
-
Kaempferol, 20.51 min
Galangin, 23.70 min