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
24,642Navigate 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
102,634Explore 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)
19,701Find 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)
8,782Shop 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
- Q-LEHD-OPh◐ .Made to order · 8–12 wks Item #: Q276128View ProductPricing & Pack Sizes
Technical Identifiers
- BMS-378806CAS: 357263-13-9 Formula: C22H22N4O4 Molecular Weight: 406.43● In Stock — US Item #: B125482View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 1-[(2R)-4-benzoyl-2-methylpiperazin-1-yl]-2-(4-methoxy-1H-pyrrolo[2,3-b]pyridin-3-yl)ethane-1,2-dione
- SMILES
- CC1CN(CCN1C(=O)C(=O)C2=CNC3=NC=CC(=C23)OC)C(=O)C4=CC=CC=C4
- InChIKey
- OKGPFTLYBPQBIX-CQSZACIVSA-N
- InChI
- show more
- Synonyms
- EINECS 218-582-1 | Piperazine, 4-benzoyl-1-[2-(4-methoxy-1H-pyrrolo[2,3-b]pyridin-3-yl)-1,2-dioxoethyl]-2-methyl-, (2...
- Quinine sulfate dihydrateBioReagent ? BioReagent grade — tested suitable for life-science and molecular-biology use. Use for cell culture, assays, and biochemical work needing biological compatibility. Moligand™ ? Moligand™ — Aladdin's line of ligands and bioactive small molecules. Use for receptor, pathway, and binding studies needing defined small-molecule tools. for Fluorescence analysis ? Fluorescence-analysis grade — very low fluorescent impurities for clean spectra. Use in fluorescence assays where background interferes. ≥99%● In Stock — US Item #: Q110176View 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...
- Platinum(IV) iodideCAS: 7790-46-7 Formula: I4Pt Molecular Weight: 702.7Platinum content: 27%◐ .Made to order · 8–12 wks Item #: P304634View ProductPricing & Pack Sizes
Technical Identifiers
- Quipazine maleate salt● In Stock — US Item #: Q137284View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (Z)-but-2-enedioic acid;2-piperazin-1-ylquinoline
- SMILES
- C1CN(CCN1)C2=NC3=CC=CC=C3C=C2.C(=CC(=O)O)C(=O)O
- InChIKey
- QYJJDHZHSCTBII-BTJKTKAUSA-N
- InChI
- 1S/C13H15N3.C4H4O4/c1-2-4-12-11(3-1)5-6-13(15-12)16-9-7-14-8-10-16;5-3(6)1-2-4(7)8/h1-6,14H,7-10H2;1-2H,(H,5,6)(H,7,8)/b;2-1-
- Synonyms
- SCHEMBL124520 | AKOS027327559 | Ext D and C Red No. 15 | Pharmakon1600-01503420 | 2-(1-Piperazinyl)quinoline (Z)-2-bu...
- Vortioxetine (Lu AA21004) HBr, Serotonin 3a (5-HT3a) receptor antagonistCAS: 960203-27-4 EC Number: 696-022-9 PubChem CID: 56843850 Formula: C18H22N2S·HBr Molecular Weight: 379.36Solid ≥98%● In Stock — US Item #: V129787View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 1-[2-(2,4-dimethylphenyl)sulfanylphenyl]piperazine;hydrobromide
- SMILES
- CC1=CC(=C(C=C1)SC2=CC=CC=C2N3CCNCC3)C.Br
- InChIKey
- VNGRUFUIHGGOOM-UHFFFAOYSA-N
- InChI
- 1S/C18H22N2S.BrH/c1-14-7-8-17(15(2)13-14)21-18-6-4-3-5-16(18)20-11-9-19-10-12-20;/h3-8,13,19H,9-12H2,1-2H3;1H
- Synonyms
- 1-(2-((2,4-Dimethylphenyl)thio)phenyl)piperazine hydrobromide | VNGRUFUIHGGOOM-UHFFFAOYSA-N | LU-AA21004 HBR | 1-(2-(...
- W-13 hydrochloride● In Stock — US Item #: W288803View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- N-(4-aminobutyl)-5-chloronaphthalene-2-sulfonamide;hydrochloride
- SMILES
- C1=CC2=C(C=CC(=C2)S(=O)(=O)NCCCCN)C(=C1)Cl.Cl
- InChIKey
- QKAALLVQBOLELJ-UHFFFAOYSA-N
- InChI
- 1S/C14H17ClN2O2S.ClH/c15-14-5-3-4-11-10-12(6-7-13(11)14)20(18,19)17-9-2-1-8-16;/h3-7,10,17H,1-2,8-9,16H2;1H
- Synonyms
- N-(4-aminobutyl)-5-chloro-2-naphthalene sulfonamide hydro chloride | N-(4-Aminobutyl)-5-chloro-2-naphthalenesulfonami...
- 5-methoxy-1-(4-methylbenzenesulfonyl)-1H-indoleCAS: 139717-71-8 Formula: C16H15NO3S Molecular Weight: 301.36◐ .Made to order · 8–12 wks Item #: H302810View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 5-methoxy-1-(4-methylphenyl)sulfonylindole
- SMILES
- CC1=CC=C(C=C1)S(=O)(=O)N2C=CC3=C2C=CC(=C3)OC
- InChIKey
- SWJXHHMYYCPWLX-UHFFFAOYSA-N
- InChI
- 1S/C16H15NO3S/c1-12-3-6-15(7-4-12)21(18,19)17-10-9-13-11-14(20-2)5-8-16(13)17/h3-11H,1-2H3
- Synonyms
- 139717-71-8|1H-Indole, 5-methoxy-1-[(4-methylphenyl)sulfonyl]-|5-Methoxy-1-tosyl-1H-indole|5-methoxy-1-(4-methylpheny...
- BMS-626529CAS: 701213-36-7 Formula: C24H23N7O4 Molecular Weight: 473.48Solid ≥98%● In Stock — US Item #: B126941View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 1-(4-benzoylpiperazin-1-yl)-2-[4-methoxy-7-(3-methyl-1,2,4-triazol-1-yl)-1H-pyrrolo[2,3-c]pyridin-3-yl]ethane-1,2-dione
- SMILES
- CC1=NN(C=N1)C2=NC=C(C3=C2NC=C3C(=O)C(=O)N4CCN(CC4)C(=O)C5=CC=CC=C5)OC
- InChIKey
- QRPZBKAMSFHVRW-UHFFFAOYSA-N
- InChI
- show more
- Synonyms
- AS-35292 | BDB21336 | 1-(4-benzoylpiperazin-1-yl)-2-[4-methoxy-7-(3-methyl-1,2,4-triazol-1-yl)-1H-pyrrolo[2,3-c]pyrid...
- T62, Adenosine A1 receptor modulator● In Stock — US Item #: T335701View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (2-amino-4,5,6,7-tetrahydro-1-benzothiophen-3-yl)-(4-chlorophenyl)methanone
- SMILES
- C1CCC2=C(C1)C(=C(S2)N)C(=O)C3=CC=C(C=C3)Cl
- InChIKey
- OTZVBZFYMFTYKH-UHFFFAOYSA-N
- InChI
- 1S/C15H14ClNOS/c16-10-7-5-9(6-8-10)14(18)13-11-3-1-2-4-12(11)19-15(13)17/h5-8H,1-4,17H2
- Synonyms
- BDBM50080540 | DTXSID20193322 | (2-amino-4,5,6,7-tetrahydro-1-benzothien-3-yl)(4-chlorophenyl)methanone | SCHEMBL1355...
- 5-Methylpyrazine-2-carbonitrileCAS: 98006-91-8 Formula: C6H5N3 Molecular Weight: 119.12Liquid ≥97%● In Stock — US Item #: M340582View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 5-methylpyrazine-2-carbonitrile
- SMILES
- CC1=CN=C(C=N1)C#N
- InChIKey
- AYMRPLHDHGMXOF-UHFFFAOYSA-N
- InChI
- 1S/C6H5N3/c1-5-3-9-6(2-7)4-8-5/h3-4H,1H3
- Synonyms
- 5-methyl-pyrazin-2-carbonitrile | EN300-106522 | PYRAZINECARBONITRILE, 5-METHYL- | FT-0649564 | SCHEMBL2143383 | Z119...
- Sulfisomidin● In Stock — US Item #: S161370View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 4-amino-N-(2,6-dimethylpyrimidin-4-yl)benzenesulfonamide
- SMILES
- CC1=CC(=NC(=N1)C)NS(=O)(=O)C2=CC=C(C=C2)N
- InChIKey
- YZMCKZRAOLZXAZ-UHFFFAOYSA-N
- InChI
- 1S/C12H14N4O2S/c1-8-7-12(15-9(2)14-8)16-19(17,18)11-5-3-10(13)4-6-11/h3-7H,13H2,1-2H3,(H,14,15,16)
- Synonyms
- NCGC00186655-01 | SULFISOMIDINE [MART.] | 6-Sulfanilamido-2,4-dimethylpyrimidine | Aristogyn | D01526 | Sulfaisomidin...
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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.