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Table 2 Biologically active compounds identified in different propolis extracts

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 - - - + +