Table 1.
The chemical composition of a crude sample of Romanian propolis and its ethanolic extract was determined (quantitative analyses).
| Chemical Composition | Crude Romanian Propolis Sample | Ethanolic Romanian Propolis Extract Samples (ERPE) | ||
|---|---|---|---|---|
| Mean (mg/g) | Standard Deviation | Mean (mg/g) | Standard Deviation | |
| phenyl acrylic acid 3-[4-hydroxy-3-(oxo butyl)] | 3.465 | 0.049 | 0.905 | 0.012 |
| phenyl cinnamic acid-5-3-prenyl-3(E)-(4-hydroxy-3-methyl-2-butenol) | 0.129 | 0.007 | 0.682 | 0.002 |
| cinnamic acid—3-prenyl-4-(2-methylpropionyloxi) | 0.789 | 0.023 | 0.187 | 0.014 |
| 3-prenyl-4-dihydrocynamoiloxicinnamic acid | 0.224 | 0.003 | 0.202 | 0.000 |
| Ferulic acid | 0.318 | 0.004 | 0.325 | 0.016 |
| 3-prenyl-4-hydroxycinnamic acid | 1.991 | 0.011 | 3.439 | 0.088 |
| 2.2-dimethyl-6-carboxyethenyl-2H-1-benzopirane | 3.993 | 0.001 | 2.782 | 0.046 |
| 2.2-dimethyl-8-prenyl-2H-1-benzopirano-6-propenoic acid | 1.569 | 0.032 | 1.119 | 0.001 |
| (E)-3-{4-hydroxy-3-[(E)-4-(2.3)-dihydrocynamoiloxi-3-methyl-2-butenyl]-5-prenylphenyl-2-propenoic acid (artepillin C) | 1.910 | 0.014 | 0.658 | 0.432 |
| Chrysin (5,7-Dihydroxyflavone) | 1.398 | 0.028 | 0.896 | 0.214 |
| 3.5-diprenyl-4-hydroxycinnamic acid | 21.524 | 0.392 | 12.335 | 0.056 |
| Apigenin (5,7-Dihydroxy-2-(4-hydroxyphenyl)-4-benzopyrone) | 9.134 | 0.198 | 3.794 | 0.008 |
| p-coumaric acid | 11.321 | 0.819 | 6.183 | 0.072 |
| Quercetin (2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy-4H-chromen-4-one) | 4.861 | 0.043 | 1.538 | 0.033 |
| Kaempferol | 0.418 | 0.028 | 0.312 | 0.001 |
| Quercetin-3-rutinoside hydrate (Rutin hydrate) | 4.685 | 0.032 | 1.621 | 0.415 |
| Caffeic acid | 0.342 | 0.002 | 0.175 | 0.004 |
| 1—caffeoylquinic acid | 0.495 | 0.485 | 0.314 | 0.005 |
| 2—caffeoylquinic acid | 0.725 | 0.594 | 0.062 | 0.028 |
| 3—caffeoylquinic acid | 1.427 | 0.484 | 0.612 | 0.003 |
| 4—caffeoylquinic acid | 2.619 | 0.001 | 0.117 | 0.000 |
| Pinocembrin | 0.536 | 0.001 | 0.876 | 0.067 |
| Total | 69.897 | - | 32.811 | - |