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).
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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
24,643Navigate 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
102,641Explore 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)
19,704Find 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)
8,783Shop 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.
Popular Products
- 6-Chloroimidazo[1,2-a]pyridine-2-carbohydrazide● In Stock — US warehouse, ships to EU* Item #: C349219View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 6-chloroimidazo[1,2-a]pyridine-2-carbohydrazide
- SMILES
- C1=CC2=NC(=CN2C=C1Cl)C(=O)NN
- InChIKey
- IUCNOGHXJSSDJV-UHFFFAOYSA-N
- InChI
- 1S/C8H7ClN4O/c9-5-1-2-7-11-6(8(14)12-10)4-13(7)3-5/h1-4H,10H2,(H,12,14)
- Synonyms
- AKOS005069700 | SB85950 | 6-Chloroimidazo[1,2-a]pyridine-2-carboxylic acid hydrazide | 6-chloroimidazo[1,2-a]pyridine...
- Sodium tetraborate pentahydrate● In Stock — US warehouse, ships to EU* Item #: S302642View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- Sodium tetraborate pentahydrate
- M8 B hydrochlorideCAS: 883976-12-3 Formula: C22H24N2O3S•HCl Molecular Weight: 433Solid ≥99%(HPLC)● In Stock — US warehouse, ships to EU* Item #: M288345View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- N-(2-aminoethyl)-N-[(3-methoxy-4-phenylmethoxyphenyl)methyl]thiophene-2-carboxamide;hydrochloride
- SMILES
- COC1=C(C=CC(=C1)CN(CCN)C(=O)C2=CC=CS2)OCC3=CC=CC=C3.Cl
- InChIKey
- FMQJBHACRTZLME-UHFFFAOYSA-N
- InChI
- 1S/C22H24N2O3S.ClH/c1-26-20-14-18(9-10-19(20)27-16-17-6-3-2-4-7-17)15-24(12-11-23)22(25)21-8-5-13-28-21;/h2-10,13-14H,11-12,15-16,23H2,1H3;1H
- Synonyms
- N-(2-Aminoethyl)-N-[[3-methoxy-4-(phenylmethoxy)phenyl]methyl]-2-thiophenecarboxamide hydrochloride | N-(2-aminoethyl...
- 6-Chloro-chroman-4-ylamine hydrochlorideCAS: 765880-61-3 Formula: C₉H₁₀ClNO·HCl Molecular Weight: 220.1◐ .Made to order · 8–12 wks Item #: C348833View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 6-chloro-3,4-dihydro-2H-chromen-4-amine
- SMILES
- C1COC2=C(C1N)C=C(C=C2)Cl
- InChIKey
- DLMNYSHJWHCTOD-UHFFFAOYSA-N
- InChI
- 1S/C9H10ClNO/c10-6-1-2-9-7(5-6)8(11)3-4-12-9/h1-2,5,8H,3-4,11H2
- Synonyms
- AS-58859 | DLMNYSHJWHCTOD-UHFFFAOYSA-N | FT-0694787 | I11430 | 6-CHLORO-3,4-DIHYDRO-2H-1-BENZOPYRAN-4-AMINE | SCHEMBL...
- Sodium salt of polynaphthalene sulphonic acidSolid ≥95%● In Stock — US warehouse, ships to EU* Item #: S303552View ProductPricing & Pack Sizes
Technical Identifiers
- SMILES
- C=O.C1=CC=C2C=C(C=CC2=C1)S(=O)(=O)O.[Na]
- InChIKey
- IWQLXFICQJMUGN-UHFFFAOYSA-N
- InChI
- 1S/C10H8O3S.CH2O.Na/c11-14(12,13)10-6-5-8-3-1-2-4-9(8)7-10;1-2;/h1-7H,(H,11,12,13);1H2;
- Synonyms
- formaldehyde naphthalene-2-sulfonic acid sodium | 2-Naphthalenesulfonic acid, polymer with formaldehyde (sodium)
- Epothilone ACAS: 152044-53-6 Formula: C26H39NO6S Molecular Weight: 493.66● In Stock — US warehouse, ships to EU* Item #: E129776View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- show more
- SMILES
- CC1CCCC2C(O2)CC(OC(=O)CC(C(C(=O)C(C1O)C)(C)C)O)C(=CC3=CSC(=N3)C)C
- InChIKey
- HESCAJZNRMSMJG-KKQRBIROSA-N
- InChI
- show more
- Synonyms
- HY-13503 | BCP9000654 | CHEBI:94722 | (1S,3S,7S,10R,11S,12S,16R)-7,11-dihydroxy-8,8,10,12-tetramethyl-3-((E)-1-(2-met...
- 6-Ethoxy-2-propyl-4-quinolinol● In Stock — US warehouse, ships to EU* Item #: E348495View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 6-ethoxy-2-propyl-1H-quinolin-4-one
- SMILES
- CCCC1=CC(=O)C2=C(N1)C=CC(=C2)OCC
- InChIKey
- UYJKXKJQZDESSJ-UHFFFAOYSA-N
- InChI
- 1S/C14H17NO2/c1-3-5-10-8-14(16)12-9-11(17-4-2)6-7-13(12)15-10/h6-9H,3-5H2,1-2H3,(H,15,16)
- Synonyms
- AKOS006026203 | 6-Ethoxy-2-propyl-4-quinolinol | 6-Ethoxy-4-hydroxy-2-propylquinoline | DTXSID00653737 | 1070879-92-3...
- 6-Ethoxy-4-hydroxyquinoline-3-carboxylic acid ethyl esterCAS: 303121-08-6 Formula: C14H15NO4 Molecular Weight: 261.27● In Stock — US warehouse, ships to EU* Item #: E348870View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- ethyl 6-ethoxy-4-oxo-1H-quinoline-3-carboxylate
- SMILES
- CCOC1=CC2=C(C=C1)NC=C(C2=O)C(=O)OCC
- InChIKey
- BDMLESWGGIPUTO-UHFFFAOYSA-N
- InChI
- 1S/C14H15NO4/c1-3-18-9-5-6-12-10(7-9)13(16)11(8-15-12)14(17)19-4-2/h5-8H,3-4H2,1-2H3,(H,15,16)
- Synonyms
- BDMLESWGGIPUTO-UHFFFAOYSA-N | AB09299 | ethyl6-ethoxy-4-hydroxyquinoline-3-carboxylate | MFCD01610200 | FT-0714666 | ...
- Aristolochic acid C● In Stock — US warehouse, ships to EU* Item #: A275388View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 10-hydroxy-6-nitronaphtho[2,1-g][1,3]benzodioxole-5-carboxylic acid
- SMILES
- C1OC2=C(O1)C3=C4C=C(C=CC4=CC(=C3C(=C2)C(=O)O)[N+](=O)[O-])O
- InChIKey
- NBFGYDJKTHENDP-UHFFFAOYSA-N
- InChI
- 1S/C16H9NO7/c18-8-2-1-7-3-11(17(21)22)13-10(16(19)20)5-12-15(24-6-23-12)14(13)9(7)4-8/h1-5,18H,6H2,(H,19,20)
- Synonyms
- 10-hydroxy-6-nitronaphtho[2,1-g][1,3]benzodioxole-5-carboxylic acid | DTXSID00197540 | ARISTOLOCHICACIDC | Aristoloch...
- Polyphyllin BCAS: 50773-42-7 Formula: C51H82O20 Molecular Weight: 1015.18Analytical 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 #: P115738View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- show more
- SMILES
- CC1CCC2(C(C3C(O2)CC4C3(CCC5C4CC=C6C5(CCC(C6)OC7C(C(C(C(O7)CO)OC8C(C(C(C(O8)C)OC9C(C(C(C(O9)C)O)O)O)O)O)O)OC2C(C(C(C(O2)C)O)O)O)C)C)C)OC1
- InChIKey
- OZIHYFWYFUSXIS-UHFFFAOYSA-N
- InChI
- show more
- Synonyms
- NCI60_002618 | LS-15499 | DIOSGENIN TETRAGLYCOSIDE | DTXSID50965019 | 2-[4,5-dihydroxy-6-[4-hydroxy-2-(hydroxymethyl)...
- MAGNESIUM ALGINATECAS: 37251-44-8 Formula: （C12H14MgO12）nSolid Technical grade ? Technical grade — industrial-quality purity with no tight impurity guarantees. Use for large-scale or non-critical processes where cost matters most.◐ .Made to order · 8–12 wks Item #: M303578View ProductPricing & Pack Sizes
Technical Identifiers
- Eslicarbazepine Acetate, Sodium channel alpha subunit blocker● In Stock — US warehouse, ships to EU* Item #: E133192View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- [(5S)-11-carbamoyl-5,6-dihydrobenzo[b][1]benzazepin-5-yl] acetate
- SMILES
- CC(=O)OC1CC2=CC=CC=C2N(C3=CC=CC=C13)C(=O)N
- InChIKey
- QIALRBLEEWJACW-INIZCTEOSA-N
- InChI
- 1S/C17H16N2O3/c1-11(20)22-16-10-12-6-2-4-8-14(12)19(17(18)21)15-9-5-3-7-13(15)16/h2-9,16H,10H2,1H3,(H2,18,21)/t16-/m0/s1
- Synonyms
- 5'-Chloro-alpha(sup 4)-(p-chlorophenyl)-alpha(sup 4)-cyano-3,5-diiodo-2',4'-salicyloxylidide | EN300-18665321 | (S)-(...
![6-Chloroimidazo[1,2-a]pyridine-2-carbohydrazide - 95%, used for , CAS No. 119448-28-1, by Aladdin Scientific](https://www.aladdinsci.com/media/catalog/product/cache/6360e336b2a70951114dbd37294096ee/C/3/C349219.png)
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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.