Indexé dans Registry
chem-similarity-search
Find structurally similar chemical compounds using PubChem's 2D fast similarity engine via the PUG-REST API.
Vue d’ensemble
Find structurally similar chemical compounds using PubChem's 2D fast similarity engine via the PUG-REST API.
Lire la documentation complète
Documentation source, pas des instructions pour ce site. Vérifiez les permissions avant d’exécuter des commandes.
Chemical Similarity Search
Goal
To programmatically find chemical analogs, alternative precursors, and structurally similar compounds for a given target molecule using PubChem's "fastsimilarity_2d" endpoint. The skill retrieves lists of similar compounds ranked by sequence alignment of their 2D molecular fingerprints, providing CIDs, molecular weights, formulas, and SMILES strings.
Instructions
1. Search by SMILES String
Search for similar compounds by providing the canonical or isomeric SMILES.
Adjust the --threshold (similarity cutoff 0-100, default is 95) to widen or narrow the search radius. Higher threshold equals higher similarity.
Adjust --max_records to limit the output length.
# Env: base-agent
python .agents/skills/chem-similarity-search/scripts/similarity_search.py \
--smiles "CC(=O)Oc1ccccc1C(=O)O" \
--threshold 95 \
--max_records 5 \
--outdir research/aspirin_similar \
--output aspirin_similar.json
2. Search by PubChem CID
Search directly using an exact compound's CID. This avoids translation steps for SMILES parsing.
# Env: base-agent
python .agents/skills/chem-similarity-search/scripts/similarity_search.py \
--cid 2244 \
--threshold 90 \
--max_records 10 \
--outdir research/aspirin_similar \
--output cid_2244_similar.json
Examples
We can test extracting highly similar analogs (Threshold 95) for Aspirin (CID: 2244 or SMILES: CC(=O)Oc1ccccc1C(=O)O).
# Env: base-agent
python .agents/skills/chem-similarity-search/scripts/similarity_search.py \
--cid 2244 \
--threshold 95 \
--max_records 5 \
--outdir .agents/skills/chem-similarity-search/examples/aspirin_analogs \
--output aspirin_analogs.json
Constraints
- Rate Limiting: PubChem PUG REST API enforces per-user throttling limits. Heavy bursts will result in
HTTP 503 Server Busyerrors. The script implements an exponential backoff retry mechanism. - 2D Similarity: Uses exact structural bit-vector fingerprints. Stereochemical and 3D properties do not strongly affect the score.
- Network: Internet access is required.
Author: Bowen Deng Contact: GitHub @learningmatter-mit
Métadonnées du fichier
name: chem-similarity-search description: Find structurally similar chemical compounds using PubChem's 2D fast similarity engine via the PUG-REST API. category: [chemistry, drug-discovery]
Voir le texte original
--- name: chem-similarity-search description: Find structurally similar chemical compounds using PubChem's 2D fast similarity engine via the PUG-REST API. category: [chemistry, drug-discovery] --- # Chemical Similarity Search ## Goal To programmatically find chemical analogs, alternative precursors, and structurally similar compounds for a given target molecule using PubChem's "fastsimilarity_2d" endpoint. The skill retrieves lists of similar compounds ranked by sequence alignment of their 2D molecular fingerprints, providing CIDs, molecular weights, formulas, and SMILES strings. ## Instructions ### 1. Search by SMILES String Search for similar compounds by providing the canonical or isomeric SMILES. Adjust the `--threshold` (similarity cutoff 0-100, default is 95) to widen or narrow the search radius. Higher threshold equals higher similarity. Adjust `--max_records` to limit the output length. ```bash # Env: base-agent python .agents/skills/chem-similarity-search/scripts/similarity_search.py \ --smiles "CC(=O)Oc1ccccc1C(=O)O" \ --threshold 95 \ --max_records 5 \ --outdir research/aspirin_similar \ --output aspirin_similar.json ``` ### 2. Search by PubChem CID Search directly using an exact compound's CID. This avoids translation steps for SMILES parsing. ```bash # Env: base-agent python .agents/skills/chem-similarity-search/scripts/similarity_search.py \ --cid 2244 \ --threshold 90 \ --max_records 10 \ --outdir research/aspirin_similar \ --output cid_2244_similar.json ``` ## Examples We can test extracting highly similar analogs (Threshold 95) for Aspirin (CID: 2244 or SMILES: `CC(=O)Oc1ccccc1C(=O)O`). ```bash # Env: base-agent python .agents/skills/chem-similarity-search/scripts/similarity_search.py \ --cid 2244 \ --threshold 95 \ --max_records 5 \ --outdir .agents/skills/chem-similarity-search/examples/aspirin_analogs \ --output aspirin_analogs.json ``` ## Constraints - **Rate Limiting**: PubChem PUG REST API enforces per-user throttling limits. Heavy bursts will result in `HTTP 503 Server Busy` errors. The script implements an exponential backoff retry mechanism. - **2D Similarity**: Uses exact structural bit-vector fingerprints. Stereochemical and 3D properties do not strongly affect the score. - **Network**: Internet access is required. --- --- **Author:** Bowen Deng **Contact:** [GitHub @learningmatter-mit](https://github.com/learningmatter-mit)
Examiner la source
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- Licence
- MIT
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Un chemin vers les instructions est enregistré. Cela ne constitue pas un test, une garantie de sécurité ou de compatibilité.
Réviser avant installation: Éviter l’installation automatique
Licence: MIT
- Dependency or permission surface needs review
- Permission surface may require sandboxing
- The SKILL.md excerpt shows an incomplete line in the script (e.g., 'elif' with no following code), but this is likely due to truncation in the provided excerpt and not a real issue.
- Quality score needs review
- Permission surface needs review: secrets or environment access, shell or command execution
- Stars/forks activity: 161 stars, 24 forks; issue activity unavailable in current metadata
- Dependency/runtime risk: command execution surface, credential or environment access
- Permission surface: secrets or environment access, shell or command execution
Les outils sont des indications de métadonnées, pas une compatibilité testée. Les prompts sont des suggestions.
Commencer par une petite tâche
- 1Lisez la source et confirmez entrées, résultats, dépendances et permissions.
- 2Demandez un plan à l’agent. Approuvez la configuration et les coûts avant un test isolé.
- 3Vérifiez résultats et fichiers modifiés. Signalez uniquement ce qui a été exécuté et conservez la révision source.
Vérifiez les dépendances, clés API et frais externes dans la source. Un dépôt public ne rend pas tous les services gratuits.
Source et conseils d’utilisation
Métadonnées et examens sont indicatifs. Popularité, découverte et exécution réussie sont des faits distincts.
- Dépôt source
- learningmatter-mit/AtomisticSkills
- Licence
- MIT
- Version
- 1.0.0
- Dernier push GitHub
- 3 sept. 2026
- Registre mis à jour
- 6 sept. 2026
- Chemin des instructions
- .agents/skills/chem-similarity-search/SKILL.md @ d1f7ecfda2cd
Version déclarée dans le registre ; vérifiez les versions de la source.
Qualité
66/100
Prometteur
Confiance
60/100
Sandbox uniquement
Audit
73/100
Revue nécessaire
- Dependency or permission surface needs review
- Permission surface may require sandboxing
- The SKILL.md excerpt shows an incomplete line in the script (e.g., 'elif' with no following code), but this is likely due to truncation in the provided excerpt and not a real issue.
- Quality score needs review
- Permission surface needs review: secrets or environment access, shell or command execution
- Stars/forks activity: 161 stars, 24 forks; issue activity unavailable in current metadata
- Dependency/runtime risk: command execution surface, credential or environment access
- Permission surface: secrets or environment access, shell or command execution
- Verified installs
- —
- Résultats
- —
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Plus de détails
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}Pour le créateur
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