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chembl

Small-molecule drug lookup by exact drug name or ChEMBL ID. Query MUST be a single drug name or ID — 1 to 3 words maximum. Valid examples: 'sotorasib', 'imatinib', 'ibrutinib', 'CHEMBL25', 'AMG 510'. If the topic is 'sotorasib KRAS G12C', the correct query is 'sotorasib'. If the topic is 'BTK inhibitors in CLL', search PubMed first to get a specific drug name, then query ChEMBL with that name. Strip protein names, mutation labels, and mechanism words — pass only the compound name.

skills/chembl/SKILL.md

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# ChEMBL Drug and Compound Lookup

Query the ChEMBL database for drug-like molecules, drug targets, and bioactivity data. ChEMBL is EBI's open database of drug discovery and medicinal chemistry.

## IMPORTANT: Query must be a specific drug or compound name

ChEMBL searches by molecule name. **Always use a specific drug name or compound identifier** (e.g. `sotorasib`, `ibrutinib`, `CHEMBL1873475`). Do NOT pass topic phrases like "kinase inhibitor resistance" — these will return garbage results. If the topic mentions multiple drugs, pick the most specific one.

## When NOT to Use This Skill

Do NOT use ChEMBL when the query is any of the following — it will return large biologics, cell therapy entries, or protein records with `MW=?`, `logP=?`, `phase=-1`:

- **Biological therapies**: cell therapies, stem cells, antibodies, CAR-T, biologics (e.g. "allogeneic mesenchymal stem cells", "anti-PD1 antibody")
- **Mechanism or concept phrases**: "proximity-induced degradation", "PROTAC linker", "covalent warhead", "undruggable target"