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
- MAK683-CH2CH2COOH hydrochlorideFormula: C23H22ClFN6O3 Molecular Weight: 484.91◐ Made to order · 8–12 wks Item #: M659034View ProductPricing & Pack Sizes
Technical Identifiers
- (E)-LHF-535Formula: C27H28N2O2 Molecular Weight: 412.52◐ Made to order · 8–12 wks Item #: E658986View ProductPricing & Pack Sizes
Technical Identifiers
- SMILES
- CC(O)(C1=CC=C(/C=C/C2=CC=C3N(C4=CC=C(OC(C)C)C=C4)C=NC3=C2)C=C1)C
- Zilovertamab◐ Made to order · 8–12 wks Item #: Z658959View ProductPricing & Pack Sizes
Technical Identifiers
- SMILES
- [Zilovertamab]
- TRV055 hydrochlorideFormula: C42H58ClN9O9 Molecular Weight: 868.42◐ Made to order · 8–12 wks Item #: T658960View ProductPricing & Pack Sizes
Technical Identifiers
- N1-Methylpseudouridine-5′-triphosphate trisodiumFormula: C10H14N2Na3O15P3 Molecular Weight: 564.11◐ Made to order · 8–12 wks Item #: N658985View ProductPricing & Pack Sizes
Technical Identifiers
- SMILES
- O[C@H]1[C@@H](O)[C@H](C(C(N2)=O)=CN(C)C2=O)O[C@@H]1COP(OP(OP(O)(O[Na])=O)(O[Na])=O)(O[Na])=O
- L-Hyoscyamine-d3Formula: C17H20D3NO3 Molecular Weight: 292.39◐ Made to order · 8–12 wks Item #: L658955View ProductPricing & Pack Sizes
Technical Identifiers
- SMILES
- O=C([C@@H](C1=CC=CC=C1)CO)O[C@H]2C[C@H]3CC[C@H](N3C([2H])([2H])[2H])C2
- (S)-UFR2709 hydrochlorideCAS: 2934318-93-9 Formula: C13H18ClNO2 Molecular Weight: 255.74● In Stock — US warehouse, ships to EU* Item #: S658956View ProductPricing & Pack Sizes
Technical Identifiers
- α-Helical CRF(9-41) TFAFormula: C168H275F3N46O55S2 Molecular Weight: 3940.42◐ Made to order · 8–12 wks Item #: H659007View ProductPricing & Pack Sizes
Technical Identifiers
- LCKLSL hydrochlorideFormula: C30H58ClN7O8S Molecular Weight: 712.34◐ Made to order · 8–12 wks Item #: L658992View ProductPricing & Pack Sizes
Technical Identifiers
- GPLGIAGQ TFACAS: 109053-09-0(free) Formula: C31H53N9O10(free) Molecular Weight: 711.8(free)● In Stock — US warehouse, ships to EU* Item #: G658993View ProductPricing & Pack Sizes
Technical Identifiers
- Microtubule-associated protein tau (26-44)Formula: C83H127N25O34S Molecular Weight: 2051.11◐ Made to order · 8–12 wks Item #: M659040View ProductPricing & Pack Sizes
Technical Identifiers
- Boc-Gln-Ala-Arg-AMC acetateFormula: C31H46N8O10 Molecular Weight: 690.74◐ Made to order · 8–12 wks Item #: B659000View ProductPricing & Pack Sizes
Technical Identifiers
Fast Shipping Same-day shipping on in-stock items
Technical Details Quality & specification info on every product page
Pack Size Options Multiple packaging sizes with pricing access from listing
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.