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
Shop by category
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
- Lu AE98134◐ Made to order · 8–12 wks Item #: L651934View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- N-butyl-4-methoxy-3-(6-methyl-[1,2,4]triazolo[3,4-a]phthalazin-3-yl)benzenesulfonamide
- SMILES
- CCCCNS(=O)(=O)C1=CC(=C(C=C1)OC)C2=NN=C3N2N=C(C4=CC=CC=C43)C
- InChIKey
- KLTJHVNRXQKMLY-UHFFFAOYSA-N
- InChI
- 1S/C21H23N5O3S/c1-4-5-12-22-30(27,28)15-10-11-19(29-3)18(13-15)21-24-23-20-17-9-7-6-8-16(17)14(2)25-26(20)21/h6-11,13,22H,4-5,12H2,1-3H3
- UNC6934CAS: 2561494-77-5 Formula: C24H21N5O4 Molecular Weight: 443.4510mM in DMSO◐ Made to order · 8–12 wks Item #: U655111View ProductPricing & Pack Sizes
Technical Identifiers
- Remdesivir-d5Formula: C27H30D5N6O8P Molecular Weight: 607.61◐ Made to order · 8–12 wks Item #: R658643View ProductPricing & Pack Sizes
Technical Identifiers
- SMILES
- C[C@H](N[P@@](OC1=C([2H])C([2H])=C([2H])C([2H])=C1[2H])(OC[C@H]2O[C@@](C#N)(C3=CC=C4C(N)=NC=NN43)[C@H](O)[C@@H]2O)=O)C(OCC(CC)CC)=O
- mmu-miR-222-3p mimicMolecular Weight: 14669.8◐ Made to order · 8–12 wks Item #: M658619View ProductPricing & Pack Sizes
Technical Identifiers
- SMILES
- [mmu-miR-222-3p mimic]
- SOR-C13 TFAFormula: C74H117F3N20O21 Molecular Weight: 1679.84◐ Made to order · 8–12 wks Item #: S658642View ProductPricing & Pack Sizes
Technical Identifiers
- Antioxidant peptide A TFACAS: 159147-88-3(free base) Formula: C33H55F3N12O9S2 Molecular Weight: 884.99● In Stock — US warehouse, ships to EU* Item #: A658618View ProductPricing & Pack Sizes
Technical Identifiers
- Melanin Concentrating Hormone, salmon TFACAS: 87218-84-6(free base) Formula: C91H140F3N27O26S4 Molecular Weight: 2213.5● In Stock — US warehouse, ships to EU* Item #: M658638View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- MCH (salmon) (TFA))
- SHP2-IN-9Formula: C20H20FN3O2S Molecular Weight: 385.46◐ Made to order · 8–12 wks Item #: S658641View ProductPricing & Pack Sizes
Technical Identifiers
- SMILES
- O=C(NCC1=CC=C(C=C1)F)CN2C=NC3=C(C4=C(S3)CCCCC4)C2=O
- Transdermal Peptide Disulfide TFACAS: 888486-23-5(free base) Formula: C42H65F3N14O18S2 Molecular Weight: 1175.17● In Stock — US warehouse, ships to EU* Item #: T658640View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- TD 1 (peptide) TFA|TD 1 Disulfide(peptide) TFA
- NJH-2-056Formula: C41H40F2N6O8 Molecular Weight: 782.79◐ Made to order · 8–12 wks Item #: N658606View ProductPricing & Pack Sizes
Technical Identifiers
- Abaloparatide TFAFormula: C176H301N56F3O51 Molecular Weight: 4074.61◐ Made to order · 8–12 wks Item #: A658609View ProductPricing & Pack Sizes
Technical Identifiers
- COG 133 TFAFormula: C99H182F3N37O21 Molecular Weight: 2283.78◐ Made to order · 8–12 wks Item #: C658607View 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.