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).
Targets & Pathways
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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
24,639Navigate 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
2,815PROTAC 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
102,615Explore 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
- Prostaglandin E2 (PGE2), Activator of CatSper1;Activator of CatSper2;Activator of CatSper3;Activator of CatSper4;Agonist of DP 1 receptor;Agonist of DP 2 receptor;Agonist of EP 1 receptor;Agonist of EP 2 receptor;Agonist of EP 3 receptor;Agonist of EP 4 receptor;Agonist of FP recMoligand™ ? Moligand™ — Aladdin's line of ligands and bioactive small molecules. Use for receptor, pathway, and binding studies needing defined small-molecule tools. 10mM in DMSO● In Stock — US warehouse, ships to EU* Item #: P408151View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- Dinoprostone
- Prostaglandin E2-d4CAS: 34210-10-1 Formula: C20H28D4O5 Molecular Weight: 356.49◐ .Made to order · 8–12 wks Item #: P342610View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (Z)-3,3,4,4-tetradeuterio-7-[(1R,2R,3R)-3-hydroxy-2-[(E,3S)-3-hydroxyoct-1-enyl]-5-oxocyclopentyl]hept-5-enoic acid
- SMILES
- CCCCCC(C=CC1C(CC(=O)C1CC=CCCCC(=O)O)O)O
- InChIKey
- XEYBRNLFEZDVAW-YOLMOHOWSA-N
- InChI
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- Synonyms
- 11R,15S-dihydroxy-9-oxo-5Z,13E-prostadienoic acid (3,3,4,4-d4) | prostaglandin E2-3,3,4,4-d4 | (Z)-3,3,4,4-tetradeute...
- Protease Inhibitor CocktailAnimal-Free, 100×● In Stock — US warehouse, ships to EU* Item #: P301903View ProductPricing & Pack Sizes
Technical Identifiers
- Protirelin Acetate10mM in Water● In Stock — US warehouse, ships to EU* Item #: P420915View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- acetic acid;N-[1-(2-carbamoylpyrrolidin-1-yl)-3-(1H-imidazol-5-yl)-1-oxopropan-2-yl]-5-oxopyrrolidine-2-carboxamide
- SMILES
- CC(=O)O.CC(=O)O.CC(=O)O.C1CC(N(C1)C(=O)C(CC2=CN=CN2)NC(=O)C3CCC(=O)N3)C(=O)N.C1CC(N(C1)C(=O)C(CC2=CN=CN2)NC(=O)C3CCC(=O)N3)C(=O)N
- InChIKey
- FCUSEANSBYKTPA-UHFFFAOYSA-N
- InChI
- show more
- Synonyms
- Thyrotropin-releasing-hormone acetate, TRH acetate, Thyroliberin acetate
- Protein kinase inhibitor 1 hydrochlorideCAS: 2321337-71-5 Formula: C18H18ClN5O3S Molecular Weight: 419.89● In Stock — US warehouse, ships to EU* Item #: P412118View ProductPricing & Pack Sizes
Technical Identifiers
- SMILES
- O=C(NC/1=O)SC1=C\\C2=CNC(C(C3=CC=C(N4CCNCC4)N=C3)=C2)=O.[H]Cl
- Synonyms
- 5-[[1,2-dihydro-2-oxo-6'-(1-piperazinyl)[3,3'-bipyridin]-5-yl]methylene]-2,4-thiazolidinedione hydrochloride
- PseudoprotodioscinCAS: 102115-79-7 EC Number: 600-274-7 PubChem CID: 51346147 Formula: C51H82O21 Molecular Weight: 1031.182mM in DMSO● In Stock — US warehouse, ships to EU* Item #: P420371View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
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- SMILES
- CC1C(C(C(C(O1)OC2C(OC(C(C2O)OC3C(C(C(C(O3)C)O)O)O)OC4CCC5(C6CCC7(C(C6CC=C5C4)CC8C7C(=C(O8)CCC(C)COC9C(C(C(C(O9)CO)O)O)O)C)C)C)CO)O)O)O
- InChIKey
- MDCUMTGKKLOMCW-MQDUZHDNSA-N
- InChI
- show more
- Synonyms
- Pseudoprotodioscin|102115-79-7|beta-D-Glucopyranoside, (3beta,25R)-26-(beta-D-glucopyranosyloxy)furosta-5,20(22)-dien...
- Psoralen10mM in DMSO● In Stock — US warehouse, ships to EU* Item #: P425374View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- furo[3,2-g]chromen-7-one
- SMILES
- C1=CC(=O)OC2=CC3=C(C=CO3)C=C21
- InChIKey
- ZCCUUQDIBDJBTK-UHFFFAOYSA-N
- InChI
- 1S/C11H6O3/c12-11-2-1-7-5-8-3-4-13-9(8)6-10(7)14-11/h1-6H
- Synonyms
- 7H-Furo(3,2-g)(1)benzopyran-7-one | BRD-K47264279-001-01-4 | DTXSID00216205 | 6-hydroxy-5-benzofuranacrylic Acid deta...
- PsoralenSolid Analytical standard ? Analytical standard — certified-purity material for quantitative calibration. Use to prepare calibration standards and validate analytical methods. ≥98%● In Stock — US warehouse, ships to EU* Item #: P101248View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- furo[3,2-g]chromen-7-one
- SMILES
- C1=CC(=O)OC2=CC3=C(C=CO3)C=C21
- InChIKey
- ZCCUUQDIBDJBTK-UHFFFAOYSA-N
- InChI
- 1S/C11H6O3/c12-11-2-1-7-5-8-3-4-13-9(8)6-10(7)14-11/h1-6H
- Synonyms
- 7H-Furo(3,2-g)(1)benzopyran-7-one | BRD-K47264279-001-01-4 | DTXSID00216205 | 6-hydroxy-5-benzofuranacrylic Acid deta...
- Protirelin Acetate● In Stock — US warehouse, ships to EU* Item #: P414636View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- acetic acid;N-[1-(2-carbamoylpyrrolidin-1-yl)-3-(1H-imidazol-5-yl)-1-oxopropan-2-yl]-5-oxopyrrolidine-2-carboxamide
- SMILES
- CC(=O)O.CC(=O)O.CC(=O)O.C1CC(N(C1)C(=O)C(CC2=CN=CN2)NC(=O)C3CCC(=O)N3)C(=O)N.C1CC(N(C1)C(=O)C(CC2=CN=CN2)NC(=O)C3CCC(=O)N3)C(=O)N
- InChIKey
- FCUSEANSBYKTPA-UHFFFAOYSA-N
- InChI
- show more
- Synonyms
- Thyrotropin-releasing-hormone acetate, TRH acetate, Thyroliberin acetate
- Protocatechuic acid10mM in DMSO● In Stock — US warehouse, ships to EU* Item #: P427224View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 3,4-dihydroxybenzoic acid
- SMILES
- C1=CC(=C(C=C1C(=O)O)O)O
- InChIKey
- YQUVCSBJEUQKSH-UHFFFAOYSA-N
- InChI
- 1S/C7H6O4/c8-5-2-1-4(7(10)11)3-6(5)9/h1-3,8-9H,(H,10,11)
- Synonyms
- AC-9617 | Carbohydroquinonic acid | DIHYDROXYBENZOIC ACID, 3,4- | Protocatechuic acid, primary pharmaceutical referen...
- Psoralenoside● In Stock — US warehouse, ships to EU* Item #: P412654View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (Z)-3-[6-[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-1-benzofuran-5-yl]prop-2-enoic acid
- SMILES
- C1=COC2=CC(=C(C=C21)C=CC(=O)O)OC3C(C(C(C(O3)CO)O)O)O
- InChIKey
- XRLPSAYLYDMYGX-UETKAVOHSA-N
- InChI
- show more
- Pteryxin● In Stock — US warehouse, ships to EU* Item #: P412629View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- [(9R,10R)-9-acetyloxy-8,8-dimethyl-2-oxo-9,10-dihydropyrano[2,3-f]chromen-10-yl] (Z)-2-methylbut-2-enoate
- SMILES
- CC=C(C)C(=O)OC1C(C(OC2=C1C3=C(C=C2)C=CC(=O)O3)(C)C)OC(=O)C
- InChIKey
- LYUZYPKZQDYMEE-YRCPKEQFSA-N
- InChI
- 1S/C21H22O7/c1-6-11(2)20(24)27-18-16-14(28-21(4,5)19(18)25-12(3)22)9-7-13-8-10-15(23)26-17(13)16/h6-10,18-19H,1-5H3/b11-6-/t18-,19-/m1/s1
- Synonyms
- (+)-(3'R,4'R)-3'-ACETYL-4'-ANGELOYLKHELLACTONE | 2-Butenoic acid, 2-methyl-, 9-(acetyloxy)-9,10-dihydro-8,8-dimethyl-...
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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.