Table 2. Compounds identified in polar fraction of ExEP from Plebeia droryana (ExEP-P) and Apis mellifera (ExEP-A) by high-performance liquid chromatography (HPLC).
| Peak | Retention time (min) | Compounds | ExEP-P mg/g ± SD |
ExEP-A mg/g ± SD |
|---|---|---|---|---|
| 1 | 8.64 | caffeic acid | 5.3 ± 0.2 | 4.9 ± 0.2 |
| 2 | 10.44 | vanillin | 5.6 ± 0.2 | - |
| 3 | 13.48 | p-coumaric acid | 2.7 ± 0.1 | 5.2 ± 0.2 |
| 4 | 17.28 | ferulic acid | 14.1 ± 0.3 | 3.8 ± 0.1 |
| 5 | 19.99 | p-methylbenzoic acid | 7.6 ± 0.3 | 7.1 ± 0.3 |
| 6 | 21.97 | sinapic acid | - | 1.8 ± 0.1 |
| 7 | 25.10 | rutin | - | 5.1 ± 0.2 |
| 8 | 35.33 | quercetin | 5.7 ± 0.2 | 6.9 ± 0.3 |
| 9 | 36.68 | luteolin | - | 3.3 ± 0.1 |
| 10 | 40.01 | cinnamic acid | 6.5 ± 0.2 | 16.4 ± 0.5 |
| 11 | 42.62 | apigenin | - | 8.6 ± 0.3 |
This is the Table 2 legend.
Data are shown as mean ± standard deviation
n = number of independent experiments in triplicate