Synthesis of 5α,8α‐Ergosterol Peroxide 3‐Carbamate Derivatives and a Fluorescent Mitochondria‐Targeting Conjugate for Enhanced Anticancer Activities
Why this work is in the frame
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Bibliographic record
Abstract
Abstract Inspired by the significant anticancer activity of our previously screened natural ergosterol peroxide ( 1 ), we synthesized and characterized a series of novel ergosterol peroxide 3‐carbamate derivatives. The antiproliferative activities of the synthesized compounds against human hepatocellular carcinoma cells (HepG2, SK‐Hep1) and human breast cancer cells (MCF‐7, MDA‐MB231) were investigated. 5α,8α‐Epidioxyergosta‐3‐yl‐(piperazine‐1)carbamate ( 3 d ) and 5α,8α‐epidioxyergosta‐3‐yl‐(piperidin‐4‐methylamine)carbamate ( 3 f ) and their hydrochloride salts exhibited significant in vitro antiproliferative activities against the tested tumor cell lines, with IC 50 values ranging from 0.85 to 4.62 μ m . Furthermore, fluorescent imaging showed that the designed coumarin– 3 d conjugate ( 5 ) localized mainly in mitochondria, leading to enhanced anticancer activities over the parent structure 1 . As a whole, it appeared that substituent changes at the C3 position could serve as a promising launch point for further design of this type of steroidal anticancer agent.
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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 | 0.004 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 it