PubChem: chemical compounds, bioassays, targets and patents
PubChem, the U.S. National Library of Medicine's open chemistry database at NCBI, through its documented PUG REST and PUG View services: find compounds by name, synonym, brand name, CAS number, SMILES, InChI, InChIKey or molecular formula; read a compound's computed properties (formula, weights, XLogP, TPSA, hydrogen-bond counts, stereochemistry), InChI, SMILES, synonyms and cross-referenced identifiers (CAS, UNII, ChEBI, ChEMBL, DrugBank, DSSTox and more); find similar compounds, substructures and superstructures ranked by Tanimoto similarity; list a compound's bioassay results across depositors and aggregate the protein and gene targets it is active against; and list the patent publications linked to it. NCBI places no restrictions on PubChem data; cross-references are identifiers only, bioassays from depositors that restrict commercial use are excluded, and every answer carries its terms and the PubChem citation.
Try PubChem: chemical compounds, bioassays, targets and patents now.
Choose an example or ask your own question.
const result = await firecrawl.scrape({
alexandria: {
provider: "pubchem-ncbi-nlm-nih-gov",
capability: "compounds/get",
options: {
cid: 5291,
},
},
});This is a sample shape. Press Run to see live data from PubChem: chemical compounds, bioassays, targets and patents.
{
"atom_stereo_count": 0,
"bond_stereo_count": 0,
"charge": 0,
"cid": 5291,
"complexity": 706,
"connectivity_smiles": "CC1=C(C=C(C=C1)NC(=O)C2=CC=C(C=C2)CN3CCN(CC3)C)NC4=NC=CC(=N4)C5=CN=CC=C5",
"covalent_unit_count": 1,
"cross_references": [
{
"id": "152459-95-5",
"sources": [
"CAS Common Chemistry",
"ChemIDplus",
"DTP/NCI",
"DrugBank",
"EPA DSSTox",
"European Chemicals Agency (ECHA)",
"FDA Global Substance Registration System (GSRS)",
"Human Metabolome Database (HMDB)"
],
"type": "CAS",
"url": "https://commonchemistry.cas.org/detail?cas_rn=152459-95-5"
},
{
"id": "604-855-6",
"sources": [
"European Chemicals Agency (ECHA)"
],
"type": "European Community (EC) Number",
"url": "https://chem.echa.europa.eu/100.122.739"
},
{
"id": "BKJ8M8G5HI",
"sources": [
"FDA Global Substance Registration System (GSRS)"
],
"type": "UNII",
"url": "https://gsrs.ncats.nih.gov/ginas/app/beta/substances/BKJ8M8G5HI"
},
{
"id": "553065",
"sources": [
"NIAID ChemDB"
],
"type": "AIDS Number",
"url": "https://pubchem.ncbi.nlm.nih.gov/substance/?source=niaid&sourceid=553065"
},
{
"id": "CHEBI:45783",
"sources": [
"ChEBI"
],
"type": "ChEBI ID",
"url": "https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:45783"
},
{
"id": "CHEMBL941",
"sources": [
"ChEMBL",
"Open Targets"
],
"type": "ChEMBL ID",
"url": "https://www.ebi.ac.uk/chembl/explore/compound/CHEMBL941"
},
{
"id": "CNP0349372.0",
"sources": [
"COlleCtion of Open Natural prodUcTs (COCONUT)"
],
"type": "COCONUT ID",
"url": "https://coconut.naturalproducts.net/compounds/CNP0349372.0"
},
{
"id": "DB00619",
"sources": [
"DrugBank"
],
"type": "DrugBank ID",
"url": "https://go.drugbank.com/drugs/DB00619"
},
{
"id": "1423",
"sources": [
"DrugCentral"
],
"type": "DrugCentral",
"url": "https://drugcentral.org/drugcard/1423"
},
{
"id": "DTXSID3037125",
"sources": [
"EPA DSSTox"
],
"type": "DSSTox Substance ID",
"url": "https://comptox.epa.gov/dashboard/DTXSID3037125"
},
{
"id": "HMDB0014757",
"sources": [
"Human Metabolome Database (HMDB)"
],
"type": "HMDB ID",
"url": "https://hmdb.ca/metabolites/HMDB0014757"
},
{
"id": "IMATINIB",
"sources": [
"European Medicines Agency (EMA)",
"FDA Global Substance Registration System (GSRS)"
],
"type": "International Nonproprietary Names (INN)",
"url": null
},
{
"id": "D08066",
"sources": [
"KEGG"
],
"type": "KEGG ID",
"url": "https://www.kegg.jp/entry/D08066"
},
{
"id": "42946",
"sources": [
"Metabolomics Workbench"
],
"type": "Metabolomics Workbench ID",
"url": "https://www.metabolomicsworkbench.org/data/StructureData.php?RegNo=42946"
},
{
"id": "C62035",
"sources": [
"NCI Thesaurus (NCIt)"
],
"type": "NCI Thesaurus Code",
"url": "https://ncithesaurus.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI_Thesaurus&ns=ncit&code=C62035"
},
{
"id": "J1.337.143A",
"sources": [
"Japan Chemical Substance Dictionary (Nikkaji)"
],
"type": "Nikkaji Number",
"url": "http://jglobal.jst.go.jp/en/redirect?Nikkaji_No=J1.337.143A"
},
{
"id": "NSC759854",
"sources": [
"DTP/NCI"
],
"type": "NSC Number",
"url": "https://dtp.cancer.gov/dtpstandard/servlet/dwindex?searchtype=NSC&outputformat=html&searchlist=759854"
},
{
"id": "NSC743414",
"sources": [
"DTP/NCI"
],
"type": "NSC Number",
"url": "https://dtp.cancer.gov/dtpstandard/servlet/dwindex?searchtype=NSC&outputformat=html&searchlist=743414"
},
{
"id": "NSC800772",
"sources": [
"DTP/NCI"
],
"type": "NSC Number",
"url": "https://dtp.cancer.gov/dtpstandard/servlet/dwindex?searchtype=NSC&outputformat=html&searchlist=800772"
},
{
"id": "PD001319",
"sources": [
"Probes & Drugs portal"
],
"type": "PD ID",
"url": "https://www.probes-drugs.org/compound/PD001319"
},
{
"id": "PA10804",
"sources": [
"ClinPGx"
],
"type": "PharmGKB ID",
"url": "https://www.clinpgx.org/chemical/PA10804"
},
{
"id": "VLU17BQBSGWU",
"sources": [
"Pharos"
],
"type": "Pharos Ligand ID",
"url": "https://pharos.nih.gov/ligands/VLU17BQBSGWU"
},
{
"id": "282388",
"sources": [
"NLM RxNorm Terminology"
],
"type": "RXCUI",
"url": "https://rxnav.nlm.nih.gov/id/rxnorm/282388"
},
{
"id": "Q177094",
"sources": [
"Wikidata"
],
"type": "Wikidata",
"url": "https://www.wikidata.org/wiki/Q177094"
},
{
"id": "Imatinib",
"sources": [
"Wikipedia"
],
"type": "Wikipedia",
"url": "https://en.wikipedia.org/wiki/Imatinib"
}
],
"defined_atom_stereo_count": 0,
"defined_bond_stereo_count": 0,
"exact_mass": 493.25900864,
"h_bond_acceptor_count": 7,
"h_bond_donor_count": 2,
"heavy_atom_count": 37,
"inchi": "InChI=1S/C29H31N7O/c1-21-5-10-25(18-27(21)34-29-31-13-11-26(33-29)24-4-3-12-30-19-24)32-28(37)23-8-6-22(7-9-23)20-36-16-14-35(2)15-17-36/h3-13,18-19H,14-17,20H2,1-2H3,(H,32,37)(H,31,33,34)",
"inchikey": "KTUFNOKKBVMGRW-UHFFFAOYSA-N",
"isotope_atom_count": 0,
"iupac_name": "4-[(4-methylpiperazin-1-yl)methyl]-N-[4-methyl-3-[(4-pyridin-3-ylpyrimidin-2-yl)amino]phenyl]benzamide",
"license": {
"attribution": "Data from PubChem, National Center for Biotechnology Information, U.S. National Library of Medicine. Cite: Kim S, Chen J, Cheng T, et al. PubChem 2025 update. Nucleic Acids Res. 2025;53(D1):D1516-D1525. doi:10.1093/nar/gkae1059",
"name": "NCBI data policy: no NCBI restrictions; depositors' terms apply",
"terms": "Computed properties, CIDs, InChI, SMILES and synonyms are PubChem data. cross_references are identifiers only, each with the PubChem sources that supplied it; no annotation text from PubChem's depositors is copied, and each linked record keeps its own source's terms (DrugBank and CAS Common Chemistry are CC BY-NC 4.0; KEGG and HMDB restrict commercial use).",
"url": "https://www.ncbi.nlm.nih.gov/home/about/policies/"
},
"matched_on": "cid",
"molecular_formula": "C29H31N7O",
"molecular_weight": 493.6,
"monoisotopic_mass": 493.25900864,
"observed_at_ms": 1793396944535,
"pubchem_url": "https://pubchem.ncbi.nlm.nih.gov/compound/5291",
"rotatable_bond_count": 7,
"smiles": "CC1=C(C=C(C=C1)NC(=O)C2=CC=C(C=C2)CN3CCN(CC3)C)NC4=NC=CC(=N4)C5=CN=CC=C5",
"synonyms": {
"items": [
"Imatinib",
"152459-95-5",
"Glamox",
"N-(4-Methyl-3-((4-(pyridin-3-yl)pyrimidin-2-yl)amino)phenyl)-4-((4-methylpiperazin-1-yl)methyl)benzamide",
"Imatinibum",
"BKJ8M8G5HI",
"4-[(4-methyl-1-piperazinyl)methyl]-N-[4-methyl-3-[[4-(3-pyridinyl)-2-pyrimidinyl]amino]phenyl]benzamide",
"NSC-743414",
"NSC-759854",
"N-(4-methyl-3-{[4-(pyridin-3-yl)pyrimidin-2-yl]amino}phenyl)-4-[(4-methylpiperazin-1-yl)methyl]benzamide",
"DTXSID3037125",
"CHEBI:45783",
"Benzamide, 4-((4-methyl)-1-piperazinyl)methyl)-N-(4-methyl-3-((4-(3-pyridinyl)-2-pyrimidinyl)amino)phenyl)-",
"alpha-(4-methyl-1-piperazinyl)-3'-((4-(3-pyridyl)-2-pyrimidinyl)amino)-p-toluidide",
"4-((4-Methyl-1-piperazinyl)methyl)-N-(4-methyl-3-((4-(3-pyridinyl)-2-pyrimidinyl)amino)phenyl)benzamide",
"RefChem:76",
"DTXCID1017125",
"L01XE01",
"Imatinib (STI571)",
"Imatinib free base"
],
"total": 166
},
"title": "Imatinib",
"tpsa": 86.3,
"undefined_atom_stereo_count": 0,
"undefined_bond_stereo_count": 0,
"xlogp": 3.5
}Data from PubChem, National Center for Biotechnology Information, U.S. National Library of Medicine. NCBI places no restrictions on its use; depositors' terms apply to their records. Cite Kim S et al., PubChem 2025 update, Nucleic Acids Res. 2025;53(D1):D1516-D1525. (https://pubchem.ncbi.nlm.nih.gov/docs/programmatic-access)
Benchmarks
Life sciences benchmarksQuality, speed and cost, last 24 hours, across every agent call to PubChem: chemical compounds, bioassays, targets and patents through Alexandria.
- Quality
- 96.5%
- Calls answered without a tool error
- Speed
- 2.4 s
- 95% of successful calls finish faster
- Cost
- 5 credits
- Firecrawl credits per call
- Calls
- 202
- Last 24 hours, every Alexandria user
| Tool | Quality | Speed | Calls |
|---|---|---|---|
| Get | 96.7% | 3.1 s | 153 |
| Search | 95.7% | 649 ms | 47 |