Buds of Baccharis dracunculifolia : potent source of biologically active caffeoylquinic acids and labdane-type diterpenes of Brazilian propolis
Bibliographic record
Abstract
Liquid chromatography mass-spectrometry (LC-MS) analysis of Brazilian propolis and the leaves, buds, stem and flowers of Baccharis dracunculifolia were performed. The water extracts of propolis and B. dracunculifolia both contain 3,4-di-O-caffeoylquinic acid (28), 3,5-di-O-caffeoylquinic acid (31) and chlorogenic acid (32). The intensities of 28 and 31 in the water extract of the buds were stronger than the other parts, suggesting that the buds of B. dracunculifolia should be potent source of these caffeoylquinic acids. Moreover, 27 individual compounds including labdane-type diterpenes, prenylated compounds, flavonoids and other phenolics which were previously isolated from Brazilian propolis, were also identified in the MeOH extract of B. dracunculifolia. Among them, 24 compounds were detected in the buds alone, indicating that it should be an important source of Brazilian propolis. The botanical origin of 19 components of Brazilian propolis was, for the first time, established to be B. dracunculifolia.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".