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
24,635Navigate 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
- QNZ (EVP4593)CAS: 545380-34-5 EC Number: 869-254-5 PubChem CID: 509554 Formula: C22H20N4O Molecular Weight: 356.42Moligand™ ? 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 #: Q408542View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- 4,6-Quinazolinediamine, N4-[2-(4-phenoxyphenyl)ethyl]-
- QS11● In Stock — US warehouse, ships to EU* Item #: Q274976View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (2S)-2-[[2-(2,3-dihydro-1H-inden-5-yloxy)-9-[(4-phenylphenyl)methyl]purin-6-yl]amino]-3-phenylpropan-1-ol
- SMILES
- C1CC2=C(C1)C=C(C=C2)OC3=NC(=C4C(=N3)N(C=N4)CC5=CC=C(C=C5)C6=CC=CC=C6)NC(CC7=CC=CC=C7)CO
- InChIKey
- DOKZLKDGUQWMSX-HKBQPEDESA-N
- InChI
- show more
- Synonyms
- MLS006010863 | QS11 | Q27166329 | BDBM50373058 | QS11 free | BDBM12590 | (2S)-2-[[2-(2,3-dihydro-1H-inden-5-yloxy)-9-...
- Qstatin● In Stock — US warehouse, ships to EU* Item #: Q412212View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 1-(5-bromothiophen-2-yl)sulfonylpyrazole
- SMILES
- C1=CN(N=C1)S(=O)(=O)C2=CC=C(S2)Br
- InChIKey
- MLRBBGFHILYDBK-UHFFFAOYSA-N
- InChI
- 1S/C7H5BrN2O2S2/c8-6-2-3-7(13-6)14(11,12)10-5-1-4-9-10/h1-5H
- Qstatin10mM in DMSO● In Stock — US warehouse, ships to EU* Item #: Q426839View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 1-(5-bromothiophen-2-yl)sulfonylpyrazole
- SMILES
- C1=CN(N=C1)S(=O)(=O)C2=CC=C(S2)Br
- InChIKey
- MLRBBGFHILYDBK-UHFFFAOYSA-N
- InChI
- 1S/C7H5BrN2O2S2/c8-6-2-3-7(13-6)14(11,12)10-5-1-4-9-10/h1-5H
- QuercetagetinSolid ≥98%● In Stock — US warehouse, ships to EU* Item #: Q342038View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2-(3,4-dihydroxyphenyl)-3,5,6,7-tetrahydroxychromen-4-one
- SMILES
- C1=CC(=C(C=C1C2=C(C(=O)C3=C(O2)C=C(C(=C3O)O)O)O)O)O
- InChIKey
- ZVOLCUVKHLEPEV-UHFFFAOYSA-N
- InChI
- 1S/C15H10O8/c16-6-2-1-5(3-7(6)17)15-14(22)13(21)10-9(23-15)4-8(18)11(19)12(10)20/h1-4,16-20,22H
- Synonyms
- 2-(3,4-Dihydroxyphenyl)-3,5,6,7-tetrahydroxy-4-benzopyrone | Quercetagenin | SV68G507VO | 4H-1-Benzopyran-4-one, 2-(3...
- Quinapril HCl, Angiotensin-converting enzyme inhibitorCAS: 82586-55-8 EC Number: 620-479-5 PubChem CID: 54891 Formula: C25H30N2O5.HCl Molecular Weight: 474.9810mM in DMSO● In Stock — US warehouse, ships to EU* Item #: Q409075View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- CI-906, PD-109452-2 | (3S)-2-[(2S)-2-[[(1S)-1-(ethoxycarbonyl)-3-phenylpropyl]amino]-1-oxopropyl]-1,�...
- Quinidine Sulfate, Sodium channel alpha subunit blockerCAS: 6591-63-5 EC Number: 678-472-8 PubChem CID: 656862 Formula: C40H48N4O4.H2SO4.2H2O Molecular Weight: 782.9410mM in DMSO● In Stock — US warehouse, ships to EU* Item #: Q425325View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (S)-[(2R,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-AHSOWCEXSA-N
- InChI
- show more
- Synonyms
- Quinidine sulfate dihydrate|6591-63-5|Quinidine sulfate|Cin-Quin|Quinidine sulfate hydrate|Quinidex Extentabs|quinidi...
- Quercetin dihydrateCAS: 6151-25-3 EC Number: 612-158-3 PubChem CID: 5284452 Formula: C15H10O7·2H2O Molecular Weight: 338.27Solid Analytical standard ? Analytical standard — certified-purity material for quantitative calibration. Use to prepare calibration standards and validate analytical methods. Moligand™ ? Moligand™ — Aladdin's line of ligands and bioactive small molecules. Use for receptor, pathway, and binding studies needing defined small-molecule tools. ≥98%(HPLC)● In Stock — US warehouse, ships to EU* Item #: Q118458View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxychromen-4-one;dihydrate
- SMILES
- C1=CC(=C(C=C1C2=C(C(=O)C3=C(C=C(C=C3O2)O)O)O)O)O.O.O
- InChIKey
- GMGIWEZSKCNYSW-UHFFFAOYSA-N
- InChI
- 1S/C15H10O7.2H2O/c16-7-4-10(19)12-11(5-7)22-15(14(21)13(12)20)6-1-2-8(17)9(18)3-6;;/h1-5,16-19,21H;2*1H2
- Synonyms
- BMK1-G2 | Quercetin dihydrate | Quercetin dihydrate - Sophoretin | BCP07318 | Quercetine dihydrate | CCRIS 3304 | Que...
- Quetiapine (ICI-204636) fumarate, Serotonin 2c (5-HT2c) receptor antagonist10mM in DMSO◐ .Made to order · 8–12 wks Item #: Q407909View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- 2-[2-(4-dibenzo[b,f][1,4]thiazepin-11-yl-1-piperazinyl)ethoxy]-ethanol,(2E)-2-butenedioate (2:1)
- Quinacrine dihydrochlorideCAS: 69-05-6 EC Number: 200-700-8 PubChem CID: 6239 Formula: C23H30ClN3O·2HCl Molecular Weight: 472.88Liquid 10mM in DMSO● In Stock — US warehouse, ships to EU* Item #: Q425539View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 4-N-(6-chloro-2-methoxyacridin-9-yl)-1-N,1-N-diethylpentane-1,4-diamine;dihydrochloride
- SMILES
- CCN(CC)CCCC(C)NC1=C2C=C(C=CC2=NC3=C1C=CC(=C3)Cl)OC.Cl.Cl
- InChIKey
- UDKVBVICMUEIKS-UHFFFAOYSA-N
- InChI
- 1S/C23H30ClN3O.2ClH/c1-5-27(6-2)13-7-8-16(3)25-23-19-11-9-17(24)14-22(19)26-21-12-10-18(28-4)15-20(21)23;;/h9-12,14-16H,5-8,13H2,1-4H3,(H,25,26);2*1H
- Synonyms
- N4-(6-chloro-2-methoxyacridin-9-yl)-N1,N1-diethylpentane-1,4-diamine dihydrochloride | 4-N-(6-chloro-2-methoxyacridin...
- Quinine HCl DihydrateCAS: 6119-47-7 EC Number: 205-001-1 PubChem CID: 16211283 Formula: C20H24N2O2·HCl·2H2O Molecular Weight: 396.9110mM in DMSO● In Stock — US warehouse, ships to EU* Item #: Q408538View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- (8α,9R)-6'-methoxy-cinchonan-9-ol,hydrochloride, hydrate (1:1:2)
- Quizartinib (AC220), Inhibitor of colony stimulating factor 1 receptor;Inhibitor of fms related receptor tyrosine kinase 3;Inhibitor of KIT proto-oncogene; receptor tyrosine kinase;Inhibitor of platelet derived growth factor receptor alpha;Inhibitor of platelet derived growthCAS: 950769-58-1 EC Number: 107-677-2 PubChem CID: 24889392 Formula: C29H32N6O4S Molecular Weight: 560.68Moligand™ ? 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 #: Q407857View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- Urea, N-[5-(1,1-dimethylethyl)-3-isoxazolyl]-N'-[4-[7-[2-(4-morpholinyl)ethoxy]imidazo[2,1-b]benzothiazol-2-yl]phenyl]-
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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.