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
24,672Navigate 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
102,686Explore 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)
19,733Find 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 (where available)—to build screening and validation sets.
By Disease (DOID)
8,799Shop 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.
Popular Products
- 1-NorokadaoneCAS: 131204-29-0 Formula: C43H66O11 Molecular Weight: 759◐ .Made to order · 8–12 wks Item #: N276204View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- show more
- SMILES
- CC1CCC2(CCCCO2)OC1C(C)CC(C3C(=C)C(C4C(O3)CCC5(O4)CCC(O5)C=CC(C)C6CC(=CC7(O6)C(CCC(O7)CC(=O)C)O)C)O)O
- InChIKey
- NJOGICJCSWVJKS-SDXZHJKRSA-N
- InChI
- show more
- Synonyms
- Norokadanone | 1-[(2S,6R,8S,11R)-2-[(E,2R)-4-[(2S,2'R,4R,4As,6R,8aR)-4-hydroxy-2-[(1S,3S)-1-hydroxy-3-[(2S,3R,6S)-3-m...
- Ruthenium(IV) sulfide● In Stock — US warehouse, ships to EU* Item #: R341629View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- bis(sulfanylidene)ruthenium
- SMILES
- S=[Ru]=S
- InChIKey
- XNQLQKWNBPVVGB-UHFFFAOYSA-N
- InChI
- 1S/Ru.2S
- Synonyms
- DTXSID6065264 | Ruthenium disulphide | RUTHENIUM(IV) SULFIDE, 99.9per cent | EINECS 235-318-0 | A805076 | AKOS0242591...
- Bis-T-23CAS: 171674-76-3 Formula: C23H20N4O8 Molecular Weight: 480.43Solid Moligand™ ? Moligand™ — Aladdin's line of ligands and bioactive small molecules. Use for receptor, pathway, and binding studies needing defined small-molecule tools. ≥97%● In Stock — US warehouse, ships to EU* Item #: R276450View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (E)-2-cyano-N-[3-[[(E)-2-cyano-3-(3,4,5-trihydroxyphenyl)prop-2-enoyl]amino]propyl]-3-(3,4,5-trihydroxyphenyl)prop-2-enamide
- SMILES
- C1=C(C=C(C(=C1O)O)O)C=C(C#N)C(=O)NCCCNC(=O)C(=CC2=CC(=C(C(=C2)O)O)O)C#N
- InChIKey
- AAPVOSBVTLGGOU-VHUAAIQRSA-N
- InChI
- show more
- Synonyms
- Bis-T-23 | AG1717 | (E)-2-cyano-N-[3-[[(E)-2-cyano-3-(3,4,5-trihydroxyphenyl)prop-2-enoyl]amino]propyl]-3-(3,4,5-trih...
- 1-tert-butyl3-ethyltrans-4-(trifluoromethyl)pyrrolidine-1,3-dicarboxylate◐ .Made to order · 8–12 wks Item #: T302862View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 1-O-tert-butyl 3-O-ethyl 4-(trifluoromethyl)pyrrolidine-1,3-dicarboxylate
- SMILES
- CCOC(=O)C1CN(CC1C(F)(F)F)C(=O)OC(C)(C)C
- InChIKey
- DDLYEPHICIJRBB-UHFFFAOYSA-N
- InChI
- 1S/C13H20F3NO4/c1-5-20-10(18)8-6-17(7-9(8)13(14,15)16)11(19)21-12(2,3)4/h8-9H,5-7H2,1-4H3
- 10-Formyl Folic AcidCAS: 134-05-4 Formula: C20H19N7O7 Molecular Weight: 469.41● In Stock — US warehouse, ships to EU* Item #: F334434View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (2S)-2-[[4-[(2-amino-4-oxo-3H-pteridin-6-yl)methyl-formylamino]benzoyl]amino]pentanedioic acid
- SMILES
- C1=CC(=CC=C1C(=O)NC(CCC(=O)O)C(=O)O)N(CC2=CN=C3C(=N2)C(=O)NC(=N3)N)C=O
- InChIKey
- UGWUWNVTCLDEOG-ZDUSSCGKSA-N
- InChI
- show more
- Synonyms
- 10-Formylpteroylglutamic Acid | 10-Formyldihydropteroylglutamate | L-GLUTAMIC ACID, N-(4-(((2-AMINO-3,4-DIHYDRO-4-OXO...
- 11-EpihydrocortisoneCAS: 566-35-8 Formula: C21H30O5 Molecular Weight: 362.46● In Stock — US warehouse, ships to EU* Item #: E357977View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (8S,9S,10R,11R,13S,14S,17R)-11,17-dihydroxy-17-(2-hydroxyacetyl)-10,13-dimethyl-2,6,7,8,9,11,12,14,15,16-decahydro-1H-cyclopenta[a]phenanthren-3-one
- SMILES
- CC12CCC(=O)C=C1CCC3C2C(CC4(C3CCC4(C(=O)CO)O)C)O
- InChIKey
- JYGXADMDTFJGBT-MKIDGPAKSA-N
- InChI
- show more
- Synonyms
- (8S,9S,10R,11R,13S,14S,17R)-11,17-Dihydroxy-17-(2-hydroxyacetyl)-10,13-dimethyl-6,7,8,9,10,11,12,13,14,15,16,17-dodec...
- Nolatrexed dihydrochloride(AG 337)CAS: 152946-68-4 EC Number: 680-267-3 PubChem CID: 135409535 Formula: C14H14Cl2N4OS Molecular Weight: 357.26Solid Moligand™ ? Moligand™ — Aladdin's line of ligands and bioactive small molecules. Use for receptor, pathway, and binding studies needing defined small-molecule tools. ≥98%◐ .Made to order · 8–12 wks Item #: N338908View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2-amino-6-methyl-5-pyridin-4-ylsulfanyl-3H-quinazolin-4-one;dihydrochloride
- SMILES
- CC1=C(C2=C(C=C1)N=C(NC2=O)N)SC3=CC=NC=C3.Cl.Cl
- InChIKey
- PJKVJJYMWOCLIJ-UHFFFAOYSA-N
- InChI
- 1S/C14H12N4OS.2ClH/c1-8-2-3-10-11(13(19)18-14(15)17-10)12(8)20-9-4-6-16-7-5-9;;/h2-7H,1H3,(H3,15,17,18,19);2*1H
- Synonyms
- 4(1H)-Quinazolinone, 2-amino-6-methyl-5-(4-pyridinylthio)-, dihydrochloride | Nolatrexed dihydrochloride | 2-Amino-6-...
- SAR 216471 hydrochloride◐ .Made to order · 8–12 wks Item #: S288883View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- N-[6-(4-butanoyl-5-methylpyrazol-1-yl)pyridazin-3-yl]-5-chloro-1-[2-(4-methylpiperazin-1-yl)-2-oxoethyl]indole-3-carboxamide;hydrochloride
- SMILES
- CCCC(=O)C1=C(N(N=C1)C2=NN=C(C=C2)NC(=O)C3=CN(C4=C3C=C(C=C4)Cl)CC(=O)N5CCN(CC5)C)C.Cl
- InChIKey
- UQLWHBMSQKUYAI-UHFFFAOYSA-N
- InChI
- show more
- Synonyms
- 5-Chloro-N-[6-[5-methyl-4-(1-oxobutyl)-1H-pyrazol-1-yl]-3-pyridazinyl]-1-[2-(4-methyl-1-piperazinyl)-2-oxoethyl]-1H-i...
- SAR7334 hydrochloride◐ .Made to order · 8–12 wks Item #: S286732View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 4-[[(1R,2R)-2-[(3R)-3-aminopiperidin-1-yl]-2,3-dihydro-1H-inden-1-yl]oxy]-3-chlorobenzonitrile;dihydrochloride
- SMILES
- C1CC(CN(C1)C2CC3=CC=CC=C3C2OC4=C(C=C(C=C4)C#N)Cl)N.Cl.Cl
- InChIKey
- LFMYIKNZNTZSJX-IQJQELQDSA-N
- InChI
- show more
- Synonyms
- 4-[[(1R,2R)-2-[(3R)-3-Amino-1-piperidinyl]-2,3-dihydro-1H-inden-1-yl]oxy]-3-chlorobenzonitrile dihydrochloride
- 17β-Estradiol 3-β-D-Glucuronide● In Stock — US warehouse, ships to EU* Item #: E357935View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- show more
- SMILES
- CC12CCC3C(C1CCC2O)CCC4=C3C=CC(=C4)OC5C(C(C(C(O5)C(=O)O)O)O)O
- InChIKey
- MUOHJTRCBBDUOW-QXYWQCSFSA-N
- InChI
- show more
- Synonyms
- Q27104364 | (2S,3S,4S,5R,6S)-3,4,5-trihydroxy-6-[[(8R,9S,13S,14S,17S)-17-hydroxy-13-methyl-6,7,8,9,11,12,14,15,16,17-...
- O-(3-sulfanylpropyl)hydroxylamineCAS: 1071-99-4 Formula: C3H10ClNOS Molecular Weight: 143.64AR ? Analytical Reagent grade — high-purity chemicals meeting strict assay limits for lab analysis. Use when accuracy matters and trace impurities could skew results.◐ .Made to order · 8–12 wks Item #: O302162View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- O-(3-sulfanylpropyl)hydroxylamine;hydrochloride
- SMILES
- C(CON)CS.Cl
- InChIKey
- JSBNCTQNPHWQPS-UHFFFAOYSA-N
- InChI
- 1S/C3H9NOS.ClH/c4-5-2-1-3-6;/h6H,1-4H2;1H
- Synonyms
- O-(3-sulfanylpropyl)hydroxylamine;hydrochloride | FT-0661986 | DTXSID30747017 | 3-(AMINOOXY)PROPANE-1-THIOLHYDROCHLOR...
- 1H-Benzoimidazol-5-ylamine dihydrochloride● In Stock — US warehouse, ships to EU* Item #: H332116View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 3H-benzimidazol-5-amine;dihydrochloride
- SMILES
- C1=CC2=C(C=C1N)NC=N2.Cl.Cl
- InChIKey
- KGUVDDLDXKLQDZ-UHFFFAOYSA-N
- InChI
- 1S/C7H7N3.2ClH/c8-5-1-2-6-7(3-5)10-4-9-6;;/h1-4H,8H2,(H,9,10);2*1H
- Synonyms
- 5-aminobenzimidazole 2HCl | SCHEMBL9450655 | EN300-34513 | 3H-benzimidazol-5-amine;dihydrochloride | AKOS022185018 | ...
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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.