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
- Nepicastat (SYN-117) HClCAS: 170151-24-3 Formula: C14H15F2N3S·HCl Molecular Weight: 331.81● In Stock — US warehouse, ships to EU* Item #: N129858View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 4-(aminomethyl)-3-[(2S)-5,7-difluoro-1,2,3,4-tetrahydronaphthalen-2-yl]-1H-imidazole-2-thione;hydrochloride
- SMILES
- C1CC2=C(CC1N3C(=CNC3=S)CN)C=C(C=C2F)F.Cl
- InChIKey
- DIPDUAJWNBEVOY-PPHPATTJSA-N
- InChI
- 1S/C14H15F2N3S.ClH/c15-9-3-8-4-10(1-2-12(8)13(16)5-9)19-11(6-17)7-18-14(19)20;/h3,5,7,10H,1-2,4,6,17H2,(H,18,20);1H/t10-;/m0./s1
- Synonyms
- SCHEMBL3418494 | 5-(aminomethyl)-1-[(2S)-5,7-difluoro-1,2,3,4-tetrahydronaphthalen-2-yl]-2,3-dihydro-1H-imidazole-2-t...
- Neurokinin B TFACAS: 101536-55-4 Formula: C55H79N13O14S2·2C2HF3O2 Molecular Weight: 1438.47● In Stock — US warehouse, ships to EU* Item #: N416431View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- β-Neurokinin Neuromedin K
- O-Desmethyl galanthamineCAS: 60755-80-8 Formula: C16H19NO3 Molecular Weight: 273.33◐ .Made to order · 8–12 wks Item #: O347565View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (1S,12S,14R)-4-methyl-11-oxa-4-azatetracyclo[8.6.1.01,12.06,17]heptadeca-6(17),7,9,15-tetraene-9,14-diol
- SMILES
- CN1CCC23C=CC(CC2OC4=C(C=CC(=C34)C1)O)O
- InChIKey
- OYSGWKOGUVOGFQ-RBOXIYTFSA-N
- InChI
- 1S/C16H19NO3/c1-17-7-6-16-5-4-11(18)8-13(16)20-15-12(19)3-2-10(9-17)14(15)16/h2-5,11,13,18-19H,6-9H2,1H3/t11-,13-,16-/m0/s1
- Synonyms
- DTXSID40209575 | (4aS,6R,8aS)-4a,5,9,10,11,12-Hexahydro-11-methyl-6H-benzofuro[3a,3,2-ef][2]benzazepine-3,6-diol | L7...
- Organosilica FITC (100nm Diam.)◐ .Made to order · 8–12 wks Item #: O406279View ProductPricing & Pack Sizes
Technical Identifiers
- Oil Red O [for Biochemical Research]◐ .Made to order · 8–12 wks Item #: O405866View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- Solvent Red 27
- Pentoxifylline-d6Moligand™ ? Moligand™ — Aladdin's line of ligands and bioactive small molecules. Use for receptor, pathway, and binding studies needing defined small-molecule tools. ≥98 atom% D,≥98%● In Stock — US warehouse, ships to EU* Item #: P334097View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 1-(5-oxohexyl)-3,7-bis(trideuteriomethyl)purine-2,6-dione
- SMILES
- CC(=O)CCCCN1C(=O)C2=C(N=CN2C)N(C1=O)C
- InChIKey
- BYPFEZZEUUWMEJ-XERRXZQWSA-N
- InChI
- 1S/C13H18N4O3/c1-9(18)6-4-5-7-17-12(19)10-11(14-8-15(10)2)16(3)13(17)20/h8H,4-7H2,1-3H3/i2D3,3D3
- Synonyms
- 3,7-Dihydro-3,7-(dimethyl-d6)-1-(5-oxohexyl)-1H-purine-2,6-dione | 3,7-di(?H?)methyl-1-(5-oxohexyl)-2,3,6,7-tetrahydr...
- Phycocyanin from SpirulinaCAS: 11016-15-2 Formula:Moligand™ ? Moligand™ — Aladdin's line of ligands and bioactive small molecules. Use for receptor, pathway, and binding studies needing defined small-molecule tools.● In Stock — US warehouse, ships to EU* Item #: P405878View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- LINABLUE|®|from|Spirulina
- Pranidipine● In Stock — US warehouse, ships to EU* Item #: P343454View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 3-O-methyl 5-O-[(E)-3-phenylprop-2-enyl] 2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate
- SMILES
- CC1=C(C(C(=C(N1)C)C(=O)OCC=CC2=CC=CC=C2)C3=CC(=CC=C3)[N+](=O)[O-])C(=O)OC
- InChIKey
- XTFPDGZNWTZCMF-DHZHZOJOSA-N
- InChI
- 1S/C25H24N2O6/c1-16-21(24(28)32-3)23(19-12-7-13-20(15-19)27(30)31)22(17(2)26-16)25(29)33-14-8-11-18-9-5-4-6-10-18/h4-13,15,23,26H,14H2,1-3H3/b11-8+
- Synonyms
- AS-15993 | AKOS025311508 | D-PIPERITONE [FHFI] | OPC-13340 | HY-19664 | Acid Rose 6BL | (E)-Cinnamyl methyl (+-)-1,4-...
- Prochlorperazine Sulfoxide● In Stock — US warehouse, ships to EU* Item #: P352135View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2-chloro-10-[3-(4-methylpiperazin-1-yl)propyl]phenothiazine 5-oxide
- SMILES
- CN1CCN(CC1)CCCN2C3=CC=CC=C3S(=O)C4=C2C=C(C=C4)Cl
- InChIKey
- AZGYHFQQUZPAFZ-UHFFFAOYSA-N
- InChI
- 1S/C20H24ClN3OS/c1-22-11-13-23(14-12-22)9-4-10-24-17-5-2-3-6-19(17)26(25)20-8-7-16(21)15-18(20)24/h2-3,5-8,15H,4,9-14H2,1H3
- Synonyms
- J-000221 | FT-0674041 | PROCHLORPERAZINE MALEATE IMPURITY A [EP IMPURITY] | (5S)-2-chloro-10-[3-(4-methylpiperazin-1-...
- ProcyanidinB2Analytical standard ? Analytical standard — certified-purity material for quantitative calibration. Use to prepare calibration standards and validate analytical methods.● In Stock — US warehouse, ships to EU* Item #: P133625View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- show more
- SMILES
- C1C(C(OC2=C1C(=CC(=C2C3C(C(OC4=CC(=CC(=C34)O)O)C5=CC(=C(C=C5)O)O)O)O)O)C6=CC(=C(C=C6)O)O)O
- InChIKey
- XFZJEEAOWLFHDH-NFJBMHMQSA-N
- InChI
- show more
- Synonyms
- BDBM50553253 | P17914 | AKOS008901339 | Proanthocyanidin B2 | PROCYANIDIN B2, (+)- | (2R,2'R,3R,3'R,4R)-2,2'-bis(3,4-...
- Quetiapine SulfoxideCAS: 329216-63-9 EC Number: 813-652-3 PubChem CID: 10431050 Formula: C21H25N3O3S Molecular Weight: 399.51Solid ≥95%● In Stock — US warehouse, ships to EU* Item #: Q352118View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2-[2-[4-[(11S)-11-oxobenzo[b][1,4]benzothiazepin-6-yl]piperazin-1-yl]ethoxy]ethanol
- SMILES
- C1CN(CCN1CCOCCO)C2=NC3=CC=CC=C3S(=O)C4=CC=CC=C42
- InChIKey
- FXJNLPUSSHEDON-NDEPHWFRSA-N
- InChI
- 1S/C21H25N3O3S/c25-14-16-27-15-13-23-9-11-24(12-10-23)21-17-5-1-3-7-19(17)28(26)20-8-4-2-6-18(20)22-21/h1-8,25H,9-16H2/t28-/m0/s1
- Synonyms
- J-018937 | Ethanol, 2-(2-(4-(5-oxidodibenzo(b,f)(1,4)thiazepin-11-yl)-1-piperazinyl)ethoxy)- | Ethanol,2-[2-[4-(5-oxi...
- Quinine sulfate fluorescence standard substanceCAS: 6119-70-6 EC Number: 639-128-2 PubChem CID: 16211610 Formula: C40H48N4O4.H2SO4.2H2O Molecular Weight: 782.95Solid Analytical standard ? Analytical standard — certified-purity material for quantitative calibration. Use to prepare calibration standards and validate analytical methods. ≥98.6%● In Stock — US warehouse, ships to EU* Item #: Q117567View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (R)-[(2S,4S,5R)-5-ethenyl-1-azabicyclo[2.2.2]octan-2-yl]-(6-methoxyquinolin-4-yl)methanol;sulfuric acid;dihydrate
- SMILES
- COC1=CC2=C(C=CN=C2C=C1)C(C3CC4CCN3CC4C=C)O.COC1=CC2=C(C=CN=C2C=C1)C(C3CC4CCN3CC4C=C)O.O.O.OS(=O)(=O)O
- InChIKey
- ZHNFLHYOFXQIOW-LPYZJUEESA-N
- InChI
- show more
- Synonyms
- CINCHONAN-9-OL, 6'-METHOXY-, (8.ALPHA.,9R)-, SULFATE, HYDRATE (2:1:2) | QUININE SULFATE HYDRATE [JAN] | 1-propyl-3-(3...
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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.