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
102,621Explore 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)
19,694Find 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 —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
- Ketotifen Fumarate, Histamine H1 receptor antagonist10mM in DMSO● In Stock — US warehouse, ships to EU* Item #: K408699View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- 4,9-dihydro-4-(1-methyl-4-piperidinylidene)-10H-benzo[4,5]cyclohepta[1,2-b]thiophen-10-one,(2E)-2-...
- KYA1797KCAS: 1956356-56-1 Formula: C17H11KN2O6S2 Molecular Weight: 442.510mM in DMSO● In Stock — US warehouse, ships to EU* Item #: K408253View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- 3-Thiazolidinepropanoic acid, 5-[[5-(4-nitrophenyl)-2-furanyl]methylene]-4-oxo-2-thioxo-, potassium sa...
- Kaempferol-3-O-neohesperidosideCAS: 32602-81-6 Formula: C27H30O15 Molecular Weight: 594.52● In Stock — US warehouse, ships to EU* Item #: K412880View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- show more
- SMILES
- CC1C(C(C(C(O1)OC2C(C(C(OC2OC3=C(OC4=CC(=CC(=C4C3=O)O)O)C5=CC=C(C=C5)O)CO)O)O)O)O)O
- InChIKey
- OHOBPOYHROOXEI-JWMUNMLDSA-N
- InChI
- show more
- Synonyms
- MS-30567 | 3-(((2S,3R,4S,5S,6R)-4,5-Dihydroxy-6-(hydroxymethyl)-3-(((2S,3R,4R,5R,6S)-3,4,5-trihydroxy-6-methyltetrahy...
- Kaempferol-3-O-neohesperidosideCAS: 32602-81-6 Formula: C27H30O15 Molecular Weight: 594.5210mM in DMSO● In Stock — US warehouse, ships to EU* Item #: K423325View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- show more
- SMILES
- CC1C(C(C(C(O1)OC2C(C(C(OC2OC3=C(OC4=CC(=CC(=C4C3=O)O)O)C5=CC=C(C=C5)O)CO)O)O)O)O)O
- InChIKey
- OHOBPOYHROOXEI-JWMUNMLDSA-N
- InChI
- show more
- Synonyms
- MS-30567 | 3-(((2S,3R,4S,5S,6R)-4,5-Dihydroxy-6-(hydroxymethyl)-3-(((2S,3R,4R,5R,6S)-3,4,5-trihydroxy-6-methyltetrahy...
- Kevetrin hydrochlorideCAS: 66592-89-0 Formula: C5H9N3S · HCl Molecular Weight: 179.67● In Stock — US warehouse, ships to EU* Item #: K413339View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 3-cyanopropyl carbamimidothioate;hydrochloride
- SMILES
- C(CC#N)CSC(=N)N.Cl
- InChIKey
- NCXJZJFDQMKRKM-UHFFFAOYSA-N
- InChI
- 1S/C5H9N3S.ClH/c6-3-1-2-4-9-5(7)8;/h1-2,4H2,(H3,7,8);1H
- Synonyms
- Carbamimidothioic acid, 3-cyanopropyl ester, monohydrochloride | EX-A627 | AS-71143 | s5811 | 66592-89-0 (HCl) | HY-1...
- Kevetrin hydrochlorideCAS: 66592-89-0 Formula: C5H9N3S · HCl Molecular Weight: 179.6710mM in DMSO● In Stock — US warehouse, ships to EU* Item #: K425351View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 3-cyanopropyl carbamimidothioate;hydrochloride
- SMILES
- C(CC#N)CSC(=N)N.Cl
- InChIKey
- NCXJZJFDQMKRKM-UHFFFAOYSA-N
- InChI
- 1S/C5H9N3S.ClH/c6-3-1-2-4-9-5(7)8;/h1-2,4H2,(H3,7,8);1H
- Synonyms
- Carbamimidothioic acid, 3-cyanopropyl ester, monohydrochloride | EX-A627 | AS-71143 | s5811 | 66592-89-0 (HCl) | HY-1...
- Ki16198CAS: 355025-13-7 Formula: C24H25ClN2O5S Molecular Weight: 488.9810mM in DMSO● In Stock — US warehouse, ships to EU* Item #: K408228View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- Propanoic acid, 3-[[[4-[4-[[[1-(2-chlorophenyl)ethoxy]carbonyl]amino]-3-methyl-5-isoxazolyl]phenyl]methyl]thio]-, met...
- Ki8751CAS: 228559-41-9 Formula: C24H18F3N3O4 Molecular Weight: 469.4110mM in DMSO● In Stock — US warehouse, ships to EU* Item #: K408947View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- N-(2,4-difluorophenyl)-N'-[4-[(6,7-dimethoxy-4-quinolinyl)oxy]-2-fluorophenyl]-urea
- Kobe0065CAS: 436133-68-5 Formula: C15H11ClF3N5O4S Molecular Weight: 449.7910mM in DMSO● In Stock — US warehouse, ships to EU* Item #: K423962View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 1-(3-chloro-4-methylphenyl)-3-[2,6-dinitro-4-(trifluoromethyl)anilino]thiourea
- SMILES
- CC1=C(C=C(C=C1)NC(=S)NNC2=C(C=C(C=C2[N+](=O)[O-])C(F)(F)F)[N+](=O)[O-])Cl
- InChIKey
- KSJVAYBCXSURMQ-UHFFFAOYSA-N
- InChI
- 1S/C15H11ClF3N5O4S/c1-7-2-3-9(6-10(7)16)20-14(29)22-21-13-11(23(25)26)4-8(15(17,18)19)5-12(13)24(27)28/h2-6,21H,1H3,(H2,20,22,29)
- Synonyms
- Kobe0065|436133-68-5|Kobe-0065|Kobe 0065|N-(3-Chloro-4-methylphenyl)-2-[2,6-dinitro-4-(trifluoromethyl)phenyl]-hydraz...
- Kobe2602CAS: 454453-49-7 Formula: C14H9F4N5O4S Molecular Weight: 419.3110mM in DMSO● In Stock — US warehouse, ships to EU* Item #: K424067View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 1-[2,6-dinitro-4-(trifluoromethyl)anilino]-3-(4-fluorophenyl)thiourea
- SMILES
- C1=CC(=CC=C1NC(=S)NNC2=C(C=C(C=C2[N+](=O)[O-])C(F)(F)F)[N+](=O)[O-])F
- InChIKey
- NNPBSITXCGPXJC-UHFFFAOYSA-N
- InChI
- 1S/C14H9F4N5O4S/c15-8-1-3-9(4-2-8)19-13(28)21-20-12-10(22(24)25)5-7(14(16,17)18)6-11(12)23(26)27/h1-6,20H,(H2,19,21,28)
- Synonyms
- 2-(2,6-dinitro-4-(trifluoromethyl)phenyl)-N-(4-fluorophenyl)hydrazinecarbothioamide
- Kukoamine BCAS: 164991-67-7 Formula: C28H42N4O6 Molecular Weight: 530.66Solid Moligand™ ? Moligand™ — Aladdin's line of ligands and bioactive small molecules. Use for receptor, pathway, and binding studies needing defined small-molecule tools. ≥98%◐ .Made to order · 8–12 wks Item #: K412633View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- N-[3-[4-[3-aminopropyl-[3-(3,4-dihydroxyphenyl)propanoyl]amino]butylamino]propyl]-3-(3,4-dihydroxyphenyl)propanamide
- SMILES
- C1=CC(=C(C=C1CCC(=O)NCCCNCCCCN(CCCN)C(=O)CCC2=CC(=C(C=C2)O)O)O)O
- InChIKey
- IWRAOCFRRTWUDF-UHFFFAOYSA-N
- InChI
- show more
- Synonyms
- Benzenepropanamide, N-(3-aminopropyl)-N-(4-((3-((3-(3,4-dihydroxyphenyl)-1-oxopropyl)amino)propyl)amino)butyl)-3,4-di...
- Koumine10mM in DMSO● In Stock — US warehouse, ships to EU* Item #: K421364View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (1R,10R,12S,15S,16R,17S)-15-ethenyl-13-methyl-19-oxa-3,13-diazahexacyclo[14.3.1.02,10.04,9.010,15.012,17]icosa-2,4,6,8-tetraene
- SMILES
- CN1CC2(C3CC4C5=NC6=CC=CC=C6C52CC1C3CO4)C=C
- InChIKey
- VTLYEMHGPMGUOT-FXWNUWCSSA-N
- InChI
- show more
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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.