Explore small molecules, screening libraries, and tool compounds for discovery research. Browse by target, pathway, or ligand family to quickly find inhibitors, agonists, and chemical probes, with searchable structure/CAS data and supporting documents (SDS/COA where available).
By Target / Pathway / Disease
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Ready-to-screen compound libraries and focused sets for hit discovery. Browse libraries by target class, pathway, scaffold, or application, and review size, format, and compound information to build screening panels.Customize Your Screening Library to choose compounds, format, and volume, and we’ll prepare a ready-to-use set for you.Customize Your Screening Library
Ligand families
24,635Navigate small molecules by ligand family or scaffold to build focused sets and explore structure–activity relationships. This category groups related chemotypes, helping you select analogs, fragments, and tool molecules for discovery research.
ADC-focused building blocks and tools to support antibody–drug conjugate research. Explore payloads, linkers, conjugation reagents, and related small-molecule components (where available) for designing and evaluating ADC constructs.
PROTAC
2,814PROTAC and targeted protein degradation tools for discovery research. Browse degrader-related ligands, linkers, and building blocks (where available) to assemble or screen PROTAC designs, with clear identifiers for efficient selection.
By Signaling Pathways
102,623Explore pathway-focused tool compounds to study and modulate key signaling cascades. Browse small molecules grouped by signaling pathway to support mechanism studies, phenotypic assays, and target validation, with clear identifiers for fast searching.
By Target (DTO)
19,695Find bioactive small molecules organized by protein target (DTO). Quickly locate tool compounds for specific targets and compare identifiers such as structure, CAS, and synonyms—plus supporting documents (where available)—to build screening and validation sets.
By Disease (DOID)
8,779Shop small molecules and tool compounds organized by disease area (DOID). Discover chemical probes, libraries, and related products mapped to therapeutic areas to help assemble compound sets for screening, pathway exploration, and model studies.
Products
- TRAM 39● In Stock — US warehouse, ships to EU* Item #: T287027View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2-(2-chlorophenyl)-2,2-diphenylacetonitrile
- SMILES
- C1=CC=C(C=C1)C(C#N)(C2=CC=CC=C2)C3=CC=CC=C3Cl
- InChIKey
- JHNRTPKGSCVKKC-UHFFFAOYSA-N
- InChI
- 1S/C20H14ClN/c21-19-14-8-7-13-18(19)20(15-22,16-9-3-1-4-10-16)17-11-5-2-6-12-17/h1-14H
- Synonyms
- 2-Chloro-α,α-diphenylbenzeneacetonitrile | 2-(2-chlorophenyl)-2,2-diphenylacetonitrile
- Tin phosphide● In Stock — US warehouse, ships to EU* Item #: T345183View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- phosphorus(3-);tin(2+)
- SMILES
- [P-3].[P-3].[P-3].[Sn+2].[Sn+2].[Sn+2].[Sn+2]
- InChIKey
- QOZWYPLTNWIZAB-UHFFFAOYSA-N
- InChI
- 1S/3P.4Sn/q3*-3;4*+2
- Synonyms
- EINECS 235-556-5 | Tetratin triphosphide
- Hematoporphyrin dihydrochlorideSolid ≥90%● In Stock — US warehouse, ships to EU* Item #: H191592View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 3-[18-(2-carboxyethyl)-8,13-bis(1-hydroxyethyl)-3,7,12,17-tetramethyl-22,23-dihydroporphyrin-2-yl]propanoic acid;dihydrochloride
- SMILES
- CC1=C(C2=CC3=NC(=CC4=NC(=CC5=C(C(=C(N5)C=C1N2)C(C)O)C)C(=C4CCC(=O)O)C)C(=C3C)CCC(=O)O)C(C)O.Cl.Cl
- InChIKey
- WZQQOXSHARXAID-UHFFFAOYSA-N
- InChI
- show more
- Synonyms
- 7,12-Bis(1-hydroxyethyl)-3,8,13,17-tetramethyl-2,18-porphinedipropionic acid 2HCl | Hematoporphyrin dichydrochloride ...
- Estrone 3-sulfate sodium salt● In Stock — US warehouse, ships to EU* Item #: E342933View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- sodium;[(8R,9S,13S,14S)-13-methyl-17-oxo-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthren-3-yl] sulfate
- SMILES
- CC12CCC3C(C1CCC2=O)CCC4=C3C=CC(=C4)OS(=O)(=O)[O-].[Na+]
- InChIKey
- VUCAHVBMSFIGAI-ZFINNJDLSA-M
- InChI
- show more
- Synonyms
- 1,3,5(10)-ESTRATRIEN-3-OL-17-ONE SULPHATE, SODIUM SALT | ESTRONE SODIUM SULFATE [VANDF] | HMS2232J23 | SMR000058772 |...
- Heparin-Binding Peptide I◐ .Made to order · 8–12 wks Item #: H274982View ProductPricing & Pack Sizes
Technical Identifiers
- Heparin-Binding Peptide II◐ .Made to order · 8–12 wks Item #: H276315View ProductPricing & Pack Sizes
Technical Identifiers
- Substance P (7-11)◐ .Made to order · 8–12 wks Item #: S276191View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- show more
- SMILES
- CC(C)CC(C(=O)NC(CCSC)C(=O)N)NC(=O)CNC(=O)C(CC1=CC=CC=C1)NC(=O)C(CC2=CC=CC=C2)N
- InChIKey
- RBKYMAQIAMFDOE-CQJMVLFOSA-N
- InChI
- show more
- Synonyms
- (2S)-N-[(2S)-1-amino-4-methylsulfanyl-1-oxobutan-2-yl]-2-[[2-[[(2S)-2-[[(2S)-2-amino-3-phenylpropanoyl]amino]-3-pheny...
- Hecogenin● In Stock — US warehouse, ships to EU* Item #: H138879View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (1R,2S,4S,5'R,6R,7S,8R,9S,12S,13S,16S,18S)-16-hydroxy-5',7,9,13-tetramethylspiro[5-oxapentacyclo[10.8.0.02,9.04,8.013,18]icosane-6,2'-oxane]-10-one
- SMILES
- CC1CCC2(C(C3C(O2)CC4C3(C(=O)CC5C4CCC6C5(CCC(C6)O)C)C)C)OC1
- InChIKey
- QOLRLLFJMZLYQJ-LOBDNJQFSA-N
- InChI
- show more
- Synonyms
- 3-beta-Hydroxy-5-alpha-spirostan-12-one | 5alpha-Spirostan-12-one, 3beta-hydroxy-, (25R)- | CHEBI:5633 | A872232 | CA...
- Irbesartan-d7CAS: 1329496-43-6 Formula: C25H21D7N6O Molecular Weight: 435.57◐ .Made to order · 8–12 wks Item #: I335359View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2-(2,2,3,3,4,4,4-heptadeuteriobutyl)-3-[[4-[2-(2H-tetrazol-5-yl)phenyl]phenyl]methyl]-1,3-diazaspiro[4.4]non-1-en-4-one
- SMILES
- CCCCC1=NC2(CCCC2)C(=O)N1CC3=CC=C(C=C3)C4=CC=CC=C4C5=NNN=N5
- InChIKey
- YOSHYTLCDANDAN-NCKGIQLSSA-N
- InChI
- show more
- Synonyms
- 2-(2,2,3,3,4,4,4-~2~H_7_)Butyl-3-{[2'-(2H-tetrazol-5-yl)[1,1'-biphenyl]-4-yl]methyl}-1,3-diazaspiro[4.4]non-1-en-4-on...
- Irganox 5057Liquid Reagent Grade ? General reagent-grade purity suitable for most laboratory work. Use as a dependable default when no specific higher grade is required.● In Stock — Germany Item #: A304374View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- N-phenylaniline;2,4,4-trimethylpent-1-ene
- SMILES
- CC(=C)CC(C)(C)C.C1=CC=C(C=C1)NC2=CC=CC=C2
- InChIKey
- NRBLRTXFXBXILY-UHFFFAOYSA-N
- InChI
- 1S/C12H11N.C8H16/c1-3-7-11(8-4-1)13-12-9-5-2-6-10-12;1-7(2)6-8(3,4)5/h1-10,13H;1,6H2,2-5H3
- Synonyms
- 68411-46-1|N-phenylaniline;2,4,4-trimethylpent-1-ene|Antioxidant 5057|Benzenamine, N-phenyl-,reaction products with 2...
- Ifenprodil hemitartrateCAS: 23210-58-4 Formula: C21H27NO2.0.5C4H6O6 Molecular Weight: 400.49● In Stock — US warehouse, ships to EU* Item #: I274628View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 4-[2-(4-benzylpiperidin-1-yl)-1-hydroxypropyl]phenol;(2R,3R)-2,3-dihydroxybutanedioic acid
- SMILES
- CC(C(C1=CC=C(C=C1)O)O)N2CCC(CC2)CC3=CC=CC=C3.CC(C(C1=CC=C(C=C1)O)O)N2CCC(CC2)CC3=CC=CC=C3.C(C(C(=O)O)O)(C(=O)O)O
- InChIKey
- DMPRDSPPYMZQBT-CEAXSRTFSA-N
- InChI
- show more
- Synonyms
- CCG-270490 | HMS3885J03 | Ifenprodil L-(+)-tartrate | AS-74914 | ifenprodil tartrate | EINECS 245-493-5 | IFENPRODIL ...
- Isocorynoxeine● In Stock — US warehouse, ships to EU* Item #: I303839View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- methyl (E)-2-[(3S,6'R,7'S,8'aS)-6'-ethenyl-2-oxospiro[1H-indole-3,1'-3,5,6,7,8,8a-hexahydro-2H-indolizine]-7'-yl]-3-methoxyprop-2-enoate
- SMILES
- COC=C(C1CC2C3(CCN2CC1C=C)C4=CC=CC=C4NC3=O)C(=O)OC
- InChIKey
- MUVGVMUWMAGNSY-VKCGGMIFSA-N
- InChI
- show more
- Synonyms
- s9239 | SPIRO(3H-INDOLE-3,1'(5'H)-INDOLIZINE)-7'-ACETIC ACID, 6'-ETHENYL-1,2,2',3',6',7',8',8'A-OCTAHYDRO-alpha-(METH...
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R&D Use Only Products supplied for research and development use
Frequently Asked Questions
What does the By Target/Pathway/Disease listing cover?
It groups compounds associated with targets in By Target/Pathway/Disease, organised so you can move from the pathway to an individual target and then to a specific chemotype. Each entry carries structure, CAS number, and reported activity.
How is By Target/Pathway/Disease organised?
By Target/Pathway/Disease is broken down into Compound Libraries, PROTACs, molecular glues and other degraders and Antibody-drug Conjugates(ADC). Compounds acting on more than one node appear under each relevant target.
How do I choose compounds for By Target/Pathway/Disease research?
For By Target/Pathway/Disease, pick a well-characterised reference compound for the node you want to perturb, and pair it with a structurally unrelated compound hitting the same target — that is the cleanest way to separate pathway effects from off-target ones. Check potency, selectivity, and cell permeability against your assay format. All products are supplied for professional research and development use only, and are not for use in humans, animals, diagnostics, or therapy.
How do I find a specific compound within By Target/Pathway/Disease?
Search By Target/Pathway/Disease by compound name, CAS number, or SMILES, or drill down through the target listing. Unlisted compounds and bulk quantities: [email protected]. We supply verified businesses, research institutions, universities, and government agencies.