Table 5.
Main components of Populus spp. 70% ethanol in water extracts *.
| Component | Black Poplars (Populus nigra L.) | Aspens (Populus tremula L.) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PN1 | PN2 | PN3 | PN4 | PN5 | PN6 | PN7 | PT1 | PT2 | PT3 | PT4 | PT5 | PT6 | |
| p-Coumaric acid | 3.22 | 2.65 | 0.14 | 14.66 | 1.77 | 13.91 | 13.43 | 3.49 | 1.67 | 4.37 | 2.51 | 1.15 | 1.65 |
| ** 1,3-Di-p-coumaroylglycerol | - | - | - | - | - | - | - | 6.68 | 12.98 | 3.79 | 1.47 | 1.37 | 2.88 |
| 2-Acetyl-1,3-di-caffeoylglycerol | - | - | - | - | - | - | - | 5.50 | 0.47 | 0.31 | 10.46 | 17.30 | 17.37 |
| Acetyl-caffeoyl-p-coumaroylglycerol | - | - | - | - | - | - | - | 10.97 | 4.19 | 3.88 | 13.83 | 17.74 | 16.93 |
| 2-Acetylo-3-caffeoyl-1-feruloylglycerol | - | - | - | - | - | - | - | 6.48 | 0.92 | 0.25 | 12.28 | 13.50 | 5.52 |
| Chrysin | 13.02 | 14.11 | 4.97 | 1.47 | 8.08 | 2.58 | 1.69 | - | - | - | - | - | - |
| Sakuranetin | - | 0.26 | - | 0.71 | 0.26 | 0.18 | 0.39 | 5.01 | 13.10 | 9.35 | 6.47 | 6.16 | 5.85 |
| Pinocembrin chalcone | - | 4.27 | 18.07 | 1.76 | 21.72 | - | - | - | - | - | - | - | - |
| Galangin | 15.25 | 15.61 | 10.90 | 4.46 | 7.20 | 2.82 | 3.22 | - | - | - | - | - | - |
| Pinobanksin-3-O-acetate | 7.25 | 7.22 | 11.36 | 1.48 | 5.87 | 2.21 | 2.44 | - | - | - | - | - | - |
| ** 2-Acetyl-1,3-di-p-coumaroylglycerol | - | - | - | - | - | - | - | 22.21 | 37.91 | 37.74 | 13.74 | 11.82 | 9.63 |
| ** 2-Acetyl-p-3-coumaroyl-1-feruloylglycerol | - | - | - | - | - | - | - | 10.19 | 7.19 | 6.49 | 14.07 | 10.34 | 2.02 |
| p-Coumaric acid benzyl ester | 2.95 | 0.46 | - | 1.12 | - | 1.58 | 2.13 | 1.93 | 2.02 | 16.39 | 1.08 | 0.35 | 6.78 |
| Pinostrobin chalcone | - | 0.94 | 10.64 | 5.72 | 10.77 | 6.25 | 1.73 | - | - | - | - | - | - |
| p-Coumaric acid cinnamic ester | - | - | - | 5.72 | 0.62 | 8.55 | 10.29 | - | - | - | - | - | - |
Legend: * amount of single component calculated as percent (%) of whole UV chromatogram area; - substance not detected under detection condition; tr, trace concentration of component <0.05%; ** substitution positioning of glycerol was tentatively identified.