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
- Doxercalciferol-d3Formula: C28H41D3O2 Molecular Weight: 415.67◐ Made to order · 8–12 wks Item #: D659361View ProductPricing & Pack Sizes
Technical Identifiers
- SMILES
- O[C@@H](C[C@H](O)C1)C(/C1=C([2H])\\C=C2[C@@]3([H])[C@@](CCC\\2)(C)[C@@H]([C@H](C)/C=C/[C@H](C)C(C)C)CC3)=C([2H])\\[2H]
- SPC5001Molecular Weight: 4689.85◐ Made to order · 8–12 wks Item #: S659397View ProductPricing & Pack Sizes
Technical Identifiers
- SMILES
- [SPC5001]
- Nintedanib-13C,d3Formula: C3013CH30D3N5O4 Molecular Weight: 543.64◐ Made to order · 8–12 wks Item #: N659350View ProductPricing & Pack Sizes
Technical Identifiers
- SMILES
- O=C(C1=CC(NC/2=O)=C(C=C1)C2=C(NC3=CC=C(N(C)C(CN4CCN([13C]([2H])([2H])[2H])CC4)=O)C=C3)/C5=CC=CC=C5)OC
- JAK-IN-5 hydrochlorideFormula: C27H32ClFN6O Molecular Weight: 511.03◐ Made to order · 8–12 wks Item #: J659444View ProductPricing & Pack Sizes
Technical Identifiers
- HKSOX-1r (5/6-mixture)Formula: C29H15F10NO14S2 Molecular Weight: 855.54Solid ≥98%◐ Made to order · 8–12 wks Item #: H659349View ProductPricing & Pack Sizes
Technical Identifiers
- GKA50 quarterhydrateFormula: C26H28N2O6.1/4H2O Molecular Weight: 469.01◐ Made to order · 8–12 wks Item #: G659443View ProductPricing & Pack Sizes
Technical Identifiers
- Histatin 5 TFAFormula: C135H196N51F3O35 Molecular Weight: 3150.31◐ Made to order · 8–12 wks Item #: H659439View ProductPricing & Pack Sizes
Technical Identifiers
- CEP-28122 mesylate saltFormula: C29H39ClN6O6S Molecular Weight: 635.17◐ Made to order · 8–12 wks Item #: C659437View ProductPricing & Pack Sizes
Technical Identifiers
- SMILES
- O=C([C@H]1[C@](C2)([H])C=C[C@]2([H])[C@H]1NC3=NC(NC4=CC=C5C(CC[C@@H](N6CCOCC6)CC5)=C4OC)=NC=C3Cl)N.O=S(C)(O)=O
- Proteasome-activating peptide 1 TFAFormula: C65H117F3N22O15S4 Molecular Weight: 1632.0210mM in DMSO◐ Made to order · 8–12 wks Item #: P661588View ProductPricing & Pack Sizes
Technical Identifiers
- GSK2945 hydrochlorideFormula: C20H19Cl3N2O2S Molecular Weight: 457.810mM in DMSO◐ Made to order · 8–12 wks Item #: G661636View ProductPricing & Pack Sizes
Technical Identifiers
- Syk-IN-4Formula: C21H25N9O Molecular Weight: 419.4810mM in DMSO◐ Made to order · 8–12 wks Item #: S661607View ProductPricing & Pack Sizes
Technical Identifiers
- SMILES
- CC1=NN(C=C1CN(C)C)C2=NC(NC3=CC=C(N(C)N=C4C(NC)=O)C4=C3)=NC=C2
- Gemcitabine elaidate hydrochlorideFormula: C27H44ClF2N3O5 Molecular Weight: 564.1110mM in DMSO◐ Made to order · 8–12 wks Item #: G661620View ProductPricing & Pack Sizes
Technical Identifiers
- SMILES
- O[C@@H](C(F)(F)[C@H](N1C(N=C(C=C1)N)=O)O2)[C@H]2COC(CCCCCCC/C=C/CCCCCCCC)=O.[H]Cl
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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.