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
24,642Navigate 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
102,634Explore 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)
19,701Find 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)
8,782Shop 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
- Fmoc-4-hydroxy-D-phenylglycine● In Stock — US Item #: F339735View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (2R)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-2-(4-hydroxyphenyl)acetic acid
- SMILES
- C1=CC=C2C(=C1)C(C3=CC=CC=C32)COC(=O)NC(C4=CC=C(C=C4)O)C(=O)O
- InChIKey
- QBYSEGZHOGZXFO-OAQYLSRUSA-N
- InChI
- show more
- Synonyms
- FMOC-4-HYDROXY-D-PHENYLGLYCINE | (2R)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-2-(4-hydroxyphenyl)acetic acid | ...
- Dihydrokainic acidCAS: 52497-36-6 Formula: C10H17NO4 Molecular Weight: 215.25◐ .Made to order · 8–12 wks Item #: D275323View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (2S,3S,4R)-3-(carboxymethyl)-4-propan-2-ylpyrrolidine-2-carboxylic acid
- SMILES
- CC(C)C1CNC(C1CC(=O)O)C(=O)O
- InChIKey
- JQPDCKOQOOQUSC-OOZYFLPDSA-N
- InChI
- 1S/C10H17NO4/c1-5(2)7-4-11-9(10(14)15)6(7)3-8(12)13/h5-7,9,11H,3-4H2,1-2H3,(H,12,13)(H,14,15)/t6-,7+,9-/m0/s1
- Synonyms
- 3-Pyrrolidineacetic acid, 2-carboxy-4-(1-methylethyl)-, (2S,3S,4R)- | Dihydrokainate | (2S,3S,4R)-3-(carboxymethyl)-4...
- Anle138bCAS: 882697-00-9 Formula: C16H11BrN2O2 Molecular Weight: 343.18● In Stock — US Item #: A288711View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 5-(1,3-benzodioxol-5-yl)-3-(3-bromophenyl)-1H-pyrazole
- SMILES
- C1OC2=C(O1)C=C(C=C2)C3=CC(=NN3)C4=CC(=CC=C4)Br
- InChIKey
- RCQIIBJSUWYYFU-UHFFFAOYSA-N
- InChI
- 1S/C16H11BrN2O2/c17-12-3-1-2-10(6-12)13-8-14(19-18-13)11-4-5-15-16(7-11)21-9-20-15/h1-8H,9H2,(H,18,19)
- Synonyms
- Tox21_200409 | AC-25903 | E7WRA77JET | A858288 | Anle138b | ANLE-138b | D80685 | AKOS037649277 | Emrusolmin | BCP3255...
- Sodium diatrizoate hydrate, Diagnostic agentCAS: 737-31-5 EC Number: 212-004-1 PubChem CID: 23672589 Formula: C11H8I3N2NaO4·xH2O Molecular Weight: 635.90(anhydrous basis)Solid 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 Item #: S122396View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- sodium;3,5-diacetamido-2,4,6-triiodobenzoate
- SMILES
- O.[Na+].CC(=O)Nc1c(I)c(NC(C)=O)c(I)c(C([O-])=O)c1I
- InChIKey
- ZEYOIOAKZLALAP-UHFFFAOYSA-M
- InChI
- 1S/C11H9I3N2O4.Na/c1-3(17)15-9-6(12)5(11(19)20)7(13)10(8(9)14)16-4(2)18;/h1-2H3,(H,15,17)(H,16,18)(H,19,20);/q;+1/p-1
- Synonyms
- Hypaque sodium | Sodium diacetyldiaminetriiodobenzoate | Urografic Acid Sodium Salt | meglumini diatrizoas | DTXCID10...
- Fmoc-4-trifluoromethyl-D-beta-homophenylalanine● In Stock — US Item #: F338334View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-[4-(trifluoromethyl)phenyl]butanoic acid
- SMILES
- C1=CC=C2C(=C1)C(C3=CC=CC=C32)COC(=O)NC(CC4=CC=C(C=C4)C(F)(F)F)CC(=O)O
- InChIKey
- LHOASNXTOYNEHC-GOSISDBHSA-N
- InChI
- show more
- Synonyms
- (3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-[4-(trifluoromethyl)phenyl]butanoic acid | Fmoc-4-trifluoromethyl-D-be...
- Histamine diphosphate monohydrate, Histamine H1 receptor agonist● In Stock — US Item #: H106192View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2-(1H-imidazol-5-yl)ethanamine;phosphoric acid
- SMILES
- C1=C(NC=N1)CCN.OP(=O)(O)O.OP(=O)(O)O
- InChIKey
- ZHIBQGJKHVBLJJ-UHFFFAOYSA-N
- InChI
- 1S/C5H9N3.2H3O4P/c6-2-1-5-3-7-4-8-5;2*1-5(2,3)4/h3-4H,1-2,6H2,(H,7,8);2*(H3,1,2,3,4)
- Synonyms
- Histamine phosphate [USP] | MFCD00064316 | Histamine Phosphate,(S) | Histamine acid phosphate | AC-24100 | DTXSID7058...
- Sulindac Sulfone◐ .Made to order · 8–12 wks Item #: S347766View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2-[(3E)-6-fluoro-2-methyl-3-[(4-methylsulfonylphenyl)methylidene]inden-1-yl]acetic acid
- SMILES
- CC1=C(C2=C(C1=CC3=CC=C(C=C3)S(=O)(=O)C)C=CC(=C2)F)CC(=O)O
- InChIKey
- MVGSNCBCUWPVDA-RQZCQDPDSA-N
- InChI
- 1S/C20H17FO4S/c1-12-17(9-13-3-6-15(7-4-13)26(2,24)25)16-8-5-14(21)10-19(16)18(12)11-20(22)23/h3-10H,11H2,1-2H3,(H,22,23)/b17-9+
- Synonyms
- Exisulind | Aptosyn | Prevatec
- Anpirtoline hydrochlorideCAS: 98330-05-3 Formula: C₁₀H¹³ClN₂S HCl Molecular Weight: 265.2◐ .Made to order · 8–12 wks Item #: A336026View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2-chloro-6-piperidin-4-ylsulfanylpyridine
- SMILES
- C1CNCCC1SC2=NC(=CC=C2)Cl
- InChIKey
- GGALEXMXDMUMDM-UHFFFAOYSA-N
- InChI
- 1S/C10H13ClN2S/c11-9-2-1-3-10(13-9)14-8-4-6-12-7-5-8/h1-3,8,12H,4-7H2
- Synonyms
- Tox21_110922 | 2-chloro-6-(piperidin-4-ylsulfanyl)pyridine | Anpirtolina | BRD-K55424922-001-01-4 | CHEBI:92968 | NCG...
- Fmoc-3-methyl-D-beta-homophenylalanineCAS: 269398-84-7 EC Number: 801-077-0 PubChem CID: 7009752 Formula: C26H25NO4 Molecular Weight: 415.49● In Stock — US Item #: F338344View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (3R)-3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-(3-methylphenyl)butanoic acid
- SMILES
- CC1=CC(=CC=C1)CC(CC(=O)O)NC(=O)OCC2C3=CC=CC=C3C4=CC=CC=C24
- InChIKey
- UKIDBCGNTDOQRO-LJQANCHMSA-N
- InChI
- show more
- Synonyms
- (R)-3-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-4-(m-tolyl)butanoic acid | AC-22233 | (betaR)-beta-[[(9H-Fluoren-9-...
- Antalarmin hydrochlorideCAS: 220953-69-5 Formula: C24H34N4•HCl Molecular Weight: 415.01Solid ≥99%● In Stock — US Item #: A286834View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- N-butyl-N-ethyl-2,5,6-trimethyl-7-(2,4,6-trimethylphenyl)pyrrolo[2,3-d]pyrimidin-4-amine;hydrochloride
- SMILES
- CCCCN(CC)C1=NC(=NC2=C1C(=C(N2C3=C(C=C(C=C3C)C)C)C)C)C.Cl
- InChIKey
- CGDGXEDXEXACKQ-UHFFFAOYSA-N
- InChI
- 1S/C24H34N4.ClH/c1-9-11-12-27(10-2)23-21-18(6)19(7)28(24(21)26-20(8)25-23)22-16(4)13-15(3)14-17(22)5;/h13-14H,9-12H2,1-8H3;1H
- Synonyms
- DTXSID00582018 | E98747 | Antalarmin hydrochloride, >=98% (HPLC), solid | HY-103377 | Butyl-ethyl-[2,5,6-trimethyl-7-...
- N-(6-Aminohexyl)-5-chloro-1-naphthalenesulfonamide HydrochlorideCAS: 61714-27-0 Formula: C16H21ClN2O2S·HCl Molecular Weight: 377.33● In Stock — US Item #: N136431View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- N-(6-aminohexyl)-5-chloronaphthalene-1-sulfonamide;hydrochloride
- SMILES
- C1=CC2=C(C=CC=C2Cl)C(=C1)S(=O)(=O)NCCCCCCN.Cl
- InChIKey
- OMMOSRLIFSCDBL-UHFFFAOYSA-N
- InChI
- 1S/C16H21ClN2O2S.ClH/c17-15-9-5-8-14-13(15)7-6-10-16(14)22(20,21)19-12-4-2-1-3-11-18;/h5-10,19H,1-4,11-12,18H2;1H
- Synonyms
- ALEXIDINE [MART.] | N-(6-aminohexyl)-5-chloronaphthalene-1-sulfonamide;hydrochloride | NCGC00178278-01 | W-7, Hydroch...
- Droloxifene citrate◐ .Made to order · 8–12 wks Item #: D275054View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 3-[(E)-1-[4-[2-(dimethylamino)ethoxy]phenyl]-2-phenylbut-1-enyl]phenol;2-hydroxypropane-1,2,3-tricarboxylic acid
- SMILES
- CCC(=C(C1=CC=C(C=C1)OCCN(C)C)C2=CC(=CC=C2)O)C3=CC=CC=C3.C(C(=O)O)C(CC(=O)O)(C(=O)O)O
- InChIKey
- GTJXPMSTODOYNP-BTKVJIOYSA-N
- InChI
- show more
- Synonyms
- K-060E | Droloxifene citrate [USAN] | (E)-alpha-(p-(2-(Dimethylamino)ethoxy)phenyl)-alpha'-ethyl-3-stilbenol citrate ...
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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.