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
- Vatalanib (PTK787) 2HCl10mM in DMSO● In Stock — US warehouse, ships to EU* Item #: V408583View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- ZK 222584 (cpg-79787) 2HCl | N-(4-chlorophenyl)-4-(pyridin-4-ylmethyl)phthalazin-1-amine dihydrochloride
- Vanillin-d3 4-O-β-D-GlucosideCAS: 494-08-6(unlabeled) Formula: C14H15D3O8 Molecular Weight: 317.31● In Stock — US warehouse, ships to EU* Item #: V341926View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- Vanilloside-d3
- Vanillylmandelic acid◐ .Made to order · 8–12 wks Item #: V413547View ProductPricing & Pack Sizes
Technical Identifiers
- SMILES
- COC1=CC(=CC=C1O)C(O)C(O)=O
- Synonyms
- VMA
- Vanin-1-IN-1◐ .Made to order · 8–12 wks Item #: V412555View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 8-oxa-2-azaspiro[4.5]decan-2-yl-[2-(pyrazin-2-ylmethylamino)pyrimidin-5-yl]methanone
- SMILES
- C1CN(CC12CCOCC2)C(=O)C3=CN=C(N=C3)NCC4=NC=CN=C4
- InChIKey
- VGRLXWFIXGZRMS-UHFFFAOYSA-N
- InChI
- 1S/C18H22N6O2/c25-16(24-6-1-18(13-24)2-7-26-8-3-18)14-9-21-17(22-10-14)23-12-15-11-19-4-5-20-15/h4-5,9-11H,1-3,6-8,12-13H2,(H,21,22,23)
- Synonyms
- VUN34002
- Vardenafil HCl TrihydrateCAS: 330808-88-3 EC Number: 685-133-8 PubChem CID: 135413545 Formula: C23H39ClN6O7S Molecular Weight: 579.1110mM in DMSO● In Stock — US warehouse, ships to EU* Item #: V408781View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- BAY38-9456 | 2-(2-ethoxy-5-(4-ethylpiperazin-1-ylsulfonyl)phenyl)-5-methyl-7-propylimidazo[1,5-f][1,2,4]triazin-4(3H)...
- Vardenafil hydrochloride10mM in DMSO● In Stock — US warehouse, ships to EU* Item #: V422704View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2-[2-ethoxy-5-(4-ethylpiperazin-1-yl)sulfonylphenyl]-5-methyl-7-propyl-3H-imidazo[5,1-f][1,2,4]triazin-4-one;hydrochloride
- SMILES
- CCCC1=NC(=C2N1N=C(NC2=O)C3=C(C=CC(=C3)S(=O)(=O)N4CCN(CC4)CC)OCC)C.Cl
- InChIKey
- XCMULUAPJXCOHI-UHFFFAOYSA-N
- InChI
- show more
- Synonyms
- Vardenafil hydrochloride|224785-91-5|Vardenafil HCL|Vardenafil (hydrochloride)|Vardenafil hydrochloride [USAN]|VARDEN...
- Varenicline (CP 526555) dihydrochloride10mM in DMSO● In Stock — US warehouse, ships to EU* Item #: V426450View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 5,8,14-triazatetracyclo[10.3.1.02,11.04,9]hexadeca-2,4,6,8,10-pentaene;dihydrochloride
- SMILES
- C1C2CNCC1C3=CC4=NC=CN=C4C=C23.Cl.Cl
- InChIKey
- NZVVYNGXLGJKCW-UHFFFAOYSA-N
- InChI
- 1S/C13H13N3.2ClH/c1-2-16-13-5-11-9-3-8(6-14-7-9)10(11)4-12(13)15-1;;/h1-2,4-5,8-9,14H,3,6-7H2;2*1H
- Synonyms
- S0717 | EX-A4238 | Varenicline dihydrochloride | Varenicline-d4 Dihydrochloride (Major) | AKOS037515551 | E98861 | Va...
- Varenicline (CP 526555) dihydrochloride● In Stock — US warehouse, ships to EU* Item #: V412504View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 5,8,14-triazatetracyclo[10.3.1.02,11.04,9]hexadeca-2,4,6,8,10-pentaene;dihydrochloride
- SMILES
- C1C2CNCC1C3=CC4=NC=CN=C4C=C23.Cl.Cl
- InChIKey
- NZVVYNGXLGJKCW-UHFFFAOYSA-N
- InChI
- 1S/C13H13N3.2ClH/c1-2-16-13-5-11-9-3-8(6-14-7-9)10(11)4-12(13)15-1;;/h1-2,4-5,8-9,14H,3,6-7H2;2*1H
- Synonyms
- S0717 | EX-A4238 | Varenicline dihydrochloride | Varenicline-d4 Dihydrochloride (Major) | AKOS037515551 | E98861 | Va...
- Varenicline Hydrochloride Labeled ¹⁵N310mM in Water● In Stock — US warehouse, ships to EU* Item #: V422735View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 5,8,14-triazatetracyclo[10.3.1.02,11.04,9]hexadeca-2,4,6,8,10-pentaene;hydrochloride
- SMILES
- C1C2CNCC1C3=CC4=NC=CN=C4C=C23.Cl
- InChIKey
- ZUCZFANFKYSVKF-UHFFFAOYSA-N
- InChI
- 1S/C13H13N3.ClH/c1-2-16-13-5-11-9-3-8(6-14-7-9)10(11)4-12(13)15-1;/h1-2,4-5,8-9,14H,3,6-7H2;1H
- Synonyms
- DTXSID8048941 | CP 526555 hcl; Chantix; Champix | DTXCID1028867 | s5022 | Tox21_112901_1 | CP-526555-18 HCl | AKOS005...
- Varespladib (LY315920), Phospholipase A2 group IIA inhibitorMoligand™ ? 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 #: V407924View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- 2-(3-(2-amino-2-oxoacetyl)-1-benzyl-2-ethyl-1H-indol-4-yloxy)acetic acid
- Vilanterol Trifenate, Beta-2 adrenergic receptor agonistCAS: 503070-58-4 EC Number: 638-763-2 PubChem CID: 44482554 Formula: C24H33Cl2NO5.C20H16O2 Molecular Weight: 774.7710mM in DMSO● In Stock — US warehouse, ships to EU* Item #: V424333View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 4-[(1R)-2-[6-[2-[(2,6-dichlorophenyl)methoxy]ethoxy]hexylamino]-1-hydroxyethyl]-2-(hydroxymethyl)phenol;2,2,2-triphenylacetic acid
- SMILES
- C1=CC=C(C=C1)C(C2=CC=CC=C2)(C3=CC=CC=C3)C(=O)O.C1=CC(=C(C(=C1)Cl)COCCOCCCCCCNCC(C2=CC(=C(C=C2)O)CO)O)Cl
- InChIKey
- KLOLZALDXGTNQE-JIDHJSLPSA-N
- InChI
- show more
- Synonyms
- Triphenylacetic acid-4-((1R)-2-((6-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)hexyl)amino)-1-hydroxyethyl)-2-(hydroxymethyl)p...
- Vilanterol Trifenate, Beta-2 adrenergic receptor agonistCAS: 503070-58-4 EC Number: 638-763-2 PubChem CID: 44482554 Formula: C24H33Cl2NO5.C20H16O2 Molecular Weight: 774.77● In Stock — US warehouse, ships to EU* Item #: V413063View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 4-[(1R)-2-[6-[2-[(2,6-dichlorophenyl)methoxy]ethoxy]hexylamino]-1-hydroxyethyl]-2-(hydroxymethyl)phenol;2,2,2-triphenylacetic acid
- SMILES
- C1=CC=C(C=C1)C(C2=CC=CC=C2)(C3=CC=CC=C3)C(=O)O.C1=CC(=C(C(=C1)Cl)COCCOCCCCCCNCC(C2=CC(=C(C=C2)O)CO)O)Cl
- InChIKey
- KLOLZALDXGTNQE-JIDHJSLPSA-N
- InChI
- show more
- Synonyms
- Triphenylacetic acid-4-((1R)-2-((6-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)hexyl)amino)-1-hydroxyethyl)-2-(hydroxymethyl)p...
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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.