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).
By Target / Pathway / Disease
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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
- 4,7,10,13-tetraoxatetradecanoic acid● In Stock — US warehouse, ships to EU* Item #: T122044View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 3-[2-[2-(2-methoxyethoxy)ethoxy]ethoxy]propanoic acid
- SMILES
- COCCOCCOCCOCCC(=O)O
- InChIKey
- ZMCJTXKSDDFJRG-UHFFFAOYSA-N
- InChI
- 1S/C10H20O6/c1-13-4-5-15-8-9-16-7-6-14-3-2-10(11)12/h2-9H2,1H3,(H,11,12)
- Synonyms
- mPEG3-OC2H4COOH | 2,5,8,11-Tetraoxatetradecan-14-oic acid
- 5,8,11,14-tetraoxa-2-azahexadecanedioic acid● In Stock — US warehouse, ships to EU* Item #: T122087View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2-[2-[2-[2-[2-(9H-fluoren-9-ylmethoxycarbonylamino)ethoxy]ethoxy]ethoxy]ethoxy]acetic acid
- SMILES
- C1=CC=C2C(=C1)C(C3=CC=CC=C32)COC(=O)NCCOCCOCCOCCOCC(=O)O
- InChIKey
- XPNLDOFYRFOXLR-UHFFFAOYSA-N
- InChI
- 1S/C25H31NO8/c27-24(28)18-33-16-15-32-14-13-31-12-11-30-10-9-26-25(29)34-17-23-21-7-3-1-5-19(21)20-6-2-4-8-22(20)23/h1-8,23H,9-18H2,(H,26,29)(H,27,28)
- Synonyms
- Fmoc-NH-PEG4-CH2COOH | 5,8,11,14-Tetraoxa-2-azahexadecanedioic acid 1-(9H-fluoren-9-ylmethyl) ester
- Ferulic Acid 4-O-Sulfate Disodium SaltCAS: 86321-29-1(free acid) Formula: C10H8O7S・2Na Molecular Weight: 318.21◐ .Made to order · 8–12 wks Item #: F332038View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- Ferulic acid 4-sulfate Disodium Salt | 3-[3-Methoxy-4-(sulfooxy)phenyl]-2-propenoic Acid Disodium Salt
- tert-Butyl 1-amino-3,6,9,12,15,18,21,24-octaoxaheptacosan-27-oateLiquid ≥98%◐ .Made to order · 8–12 wks Item #: H122162View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- tert-butyl 3-[2-[2-[2-[2-[2-[2-[2-(2-aminoethoxy)ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]propanoate
- SMILES
- CC(C)(C)OC(=O)CCOCCOCCOCCOCCOCCOCCOCCOCCN
- InChIKey
- UMJVFHNJPJVDSB-UHFFFAOYSA-N
- InChI
- 1S/C23H47NO10/c1-23(2,3)34-22(25)4-6-26-8-10-28-12-14-30-16-18-32-20-21-33-19-17-31-15-13-29-11-9-27-7-5-24/h4-21,24H2,1-3H3
- Synonyms
- BS-17527 | 1-AMINO-3,6,9,12,15,18,21,24-OCTAOXAHEPTACOSAN-27-OIC ACID T-BUTYL ESTER | s10747 | SCHEMBL19384768 | tert...
- Mal-PEG4-NHS esterCAS: 1325208-25-0 Formula: C19H26N2O10 Molecular Weight: 442.42● In Stock — US warehouse, ships to EU* Item #: M337304View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (2,5-dioxopyrrolidin-1-yl) 3-[2-[2-[2-[2-(2,5-dioxopyrrol-1-yl)ethoxy]ethoxy]ethoxy]ethoxy]propanoate
- SMILES
- C1CC(=O)N(C1=O)OC(=O)CCOCCOCCOCCOCCN2C(=O)C=CC2=O
- InChIKey
- TUPOSLKVPPFQGR-UHFFFAOYSA-N
- InChI
- 1S/C19H26N2O10/c22-15-1-2-16(23)20(15)6-8-28-10-12-30-14-13-29-11-9-27-7-5-19(26)31-21-17(24)3-4-18(21)25/h1-2H,3-14H2
- Synonyms
- 2,5-Dioxopyrrolidin-1-yl 1-(2,5-dioxo-2H-pyrrol-1(5H)-yl)-3,6,9,12-tetraoxapentadecan-15-oate
- Methotrexate disodium salt, Dihydrofolate reductase inhibitorSolid Moligand™ ? Moligand™ — Aladdin's line of ligands and bioactive small molecules. Use for receptor, pathway, and binding studies needing defined small-molecule tools. ≥98%● In Stock — US warehouse, ships to EU* Item #: M338754View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- disodium;(2S)-2-[[4-[(2,4-diaminopteridin-6-yl)methyl-methylamino]benzoyl]amino]pentanedioate
- SMILES
- CN(CC1=CN=C2C(=N1)C(=NC(=N2)N)N)C3=CC=C(C=C3)C(=O)NC(CCC(=O)[O-])C(=O)[O-].[Na+].[Na+]
- InChIKey
- DASQOOZCTWOQPA-GXKRWWSZSA-L
- InChI
- show more
- Synonyms
- Methotrexate, Sodium Salt | DTXCID1017123 | MS-20174 | Disodium methotrexate | DS-3425 | 3,6-Endomethylenephthalic an...
- Tetrabutylammonium Bromodiiodide◐ .Made to order · 8–12 wks Item #: T162435View ProductPricing & Pack Sizes
Technical Identifiers
- SMILES
- CCCC[N+](CCCC)(CCCC)CCCC.Br[I-]I
- InChIKey
- HDVYDCKEPDMCAF-UHFFFAOYSA-N
- InChI
- 1S/C16H36N.BrI2/c1-5-9-13-17(14-10-6-2,15-11-7-3)16-12-8-4;1-3-2/h5-16H2,1-4H3;/q+1;-1
- Synonyms
- T1270 | DTXSID20659953 | Tetrabutylammonium Bromodiiodide | MFCD00059122 | tetra-n-butylammonium bromodiiodide | J-01...
- rac 5-Hydroxy Valproic Acid Sodium SaltCAS: 78644-53-8 EC Number: 110-071-0 PubChem CID: 46781923 Formula: C8H15NaO3 Molecular Weight: 182.19Solid ≥95%◐ .Made to order · 8–12 wks Item #: R332311View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- sodium;5-hydroxy-2-propylpentanoate
- SMILES
- CCCC(CCCO)C(=O)[O-].[Na+]
- InChIKey
- CSZWWXWOLIYBAB-UHFFFAOYSA-M
- InChI
- 1S/C8H16O3.Na/c1-2-4-7(8(10)11)5-3-6-9;/h7,9H,2-6H2,1H3,(H,10,11);/q;+1/p-1
- Synonyms
- 5-OH-VPA | 5-Hydroxy-2-propylpentanoic Acid | 2-Propyl-5-hydroxypentanoic Acid Sodium Salt
- AD 01◐ .Made to order · 8–12 wks Item #: A286737View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- show more
- SMILES
- show more
- InChIKey
- MBICTOITIIILAZ-UNWACOBVSA-N
- InChI
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- APC 366◐ .Made to order · 8–12 wks Item #: A287530View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (2S)-1-[(2S)-5-(diaminomethylideneamino)-2-[(1-hydroxynaphthalene-2-carbonyl)amino]pentanoyl]pyrrolidine-2-carboxamide
- SMILES
- C1CC(N(C1)C(=O)C(CCCN=C(N)N)NC(=O)C2=C(C3=CC=CC=C3C=C2)O)C(=O)N
- InChIKey
- SKYWIMYOGAWOMB-IRXDYDNUSA-N
- InChI
- show more
- Synonyms
- N-[1-hydroxy-2-naphthoyl]-l-arginyl-l-prolinamide | APC 366 (hydrochloride) | BOSAPTLE0I | L-Prolinamide, N2-((1-hydr...
- ATN-161 trifluoroacetate saltCAS: 262438-43-7(free) Formula: C25H36F3N9O10S Molecular Weight: 711.67● In Stock — US warehouse, ships to EU* Item #: A286606View ProductPricing & Pack Sizes
Technical Identifiers
- Autocamtide-2-related inhibitory peptide TFACAS: 167114-91-2(free) Formula: C80H143F3N22O22 Molecular Weight: 1822.1● In Stock — US warehouse, ships to EU* Item #: A488861View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- [Ala9]-Autocamtide 2, AIP | Autocamtide-2-Related Inhibitory Peptide
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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.