Derrisisoflavones H–K and One Isoflavan Derivative from Derris robusta
Bibliographic record
Abstract
Derris is a genus belonging to the Leguminosae family with about 800 species that are widely distributed in tropical, subtropical areas of Asia and Africa [ 1 ]. Published studies have shown that the genus is a rich source of pterocarpans, flavonoids, particularly prenylated isoflavonoids and flavonoids [ 2 – 5 ] and these phytochemicals are associated with a broad spectrum of biological activities, including insecticidal, antimicrobial, cytotoxic, and antioxidant activities [ 3 – 7 ]. As part of a BioBioPha [ http://www.chemlib.cn/ ] objective to assemble a large-scale natural product library valuable in the discovery of new drug leads from nature [ 8 – 10 ], the phytochemical investigation on the twigs and leaves of Derris robusta led to the isolation of four new prenylated isoflavonoids, named derrisisoflavones H–K ( 1 – 4 ), and a new isoflavan, namely 6-hydroxyisosativan ( 5 ). This paper describes the isolation and structural elucidation of five new compounds (Fig. 1 ).
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.000 |
| 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) | 0.003 | 0.001 |
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 source (direct Gemma or distilled Codex), 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".