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
- Leukotriene E4 20◐ .Made to order · 8–12 wks Item #: L276297View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- (5S,6R,7E,9E,11Z,14Z)-6-(2-Amino-2-carboxyethyl)sulfanyl-20,20,20-trideutero-5-hydroxyicosa-7,9,11,14-tetraenoicacid
- 3′-O-AcetylthymidineCAS: 21090-30-2 Formula: C12H16N2O6 Molecular Weight: 284.27● In Stock — US warehouse, ships to EU* Item #: O353586View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- [(2R,3S,5R)-2-(hydroxymethyl)-5-(5-methyl-2,4-dioxopyrimidin-1-yl)oxolan-3-yl] acetate
- SMILES
- CC1=CN(C(=O)NC1=O)C2CC(C(O2)CO)OC(=O)C
- InChIKey
- IRFKBRPHBYCMQU-IVZWLZJFSA-N
- InChI
- 1S/C12H16N2O6/c1-6-4-14(12(18)13-11(6)17)10-3-8(19-7(2)16)9(5-15)20-10/h4,8-10,15H,3,5H2,1-2H3,(H,13,17,18)/t8-,9+,10+/m0/s1
- Synonyms
- 3'-O-Acetyl-D-thymidine
- (E)-4-Hydroxy-3-methoxycinnamic acid 4-O-β-D-glucopyranosideCAS: 117405-51-3 Formula: C16H20O9 Molecular Weight: 356.325● In Stock — US warehouse, ships to EU* Item #: E302267View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (E)-3-[3-methoxy-4-[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyphenyl]prop-2-enoic acid
- SMILES
- COC1=C(C=CC(=C1)C=CC(=O)O)OC2C(C(C(C(O2)CO)O)O)O
- InChIKey
- IEMIRSXOYFWPFD-BJGSYIFTSA-N
- InChI
- show more
- Synonyms
- A-D-glucopyranoside | HY-W047187 | D81027 | 2-Propenoic acid, 3-[4-(beta-D-glucopyranosyloxy)-3-methoxyphenyl]-, (2E)...
- (2S,3R,4E)-2-Azido-3-(tert-butyldimethylsilyl)-erythro-sphingosine◐ .Made to order · 8–12 wks Item #: S276026View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (E,2S,3R)-2-azido-3-[tert-butyl(dimethyl)silyl]oxyoctadec-4-en-1-ol
- SMILES
- CCCCCCCCCCCCCC=CC(C(CO)N=[N+]=[N-])O[Si](C)(C)C(C)(C)C
- InChIKey
- MALQUZUDYJXZJI-DWVLVAQTSA-N
- InChI
- show more
- Synonyms
- (2S,3R,4E)-2-Azido-3-(tert-butyldimethylsilyl)-4-octadecene-3-ol
- [Tyr8]-Substance P◐ .Made to order · 8–12 wks Item #: T275382View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- show more
- SMILES
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- InChIKey
- MSKLWPIJUANGPO-CUZNLEPHSA-N
- InChI
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- Synonyms
- Substance P, tyrosine(8)- | 8-Tyr-substance P | Arg-Pro-Lys-Pro-Gln-Gln-Phe-Tyr-Gly-Leu-Met-NH2 | Substance P, tyr(8)...
- PBP 10◐ .Made to order · 8–12 wks Item #: P288117View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
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- SMILES
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- InChIKey
- OIOWMSSANHIUTR-NVWDZAHRSA-N
- InChI
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- 1-chlorodibenzo[b,d]furanCAS: 84761-86-4 Formula: C12H7ClO Molecular Weight: 202.63● In Stock — US warehouse, ships to EU* Item #: C304762View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 1-chlorodibenzofuran
- SMILES
- C1=CC=C2C(=C1)C3=C(O2)C=CC=C3Cl
- InChIKey
- WRSMJZYBNIAAEE-UHFFFAOYSA-N
- InChI
- 1S/C12H7ClO/c13-9-5-3-7-11-12(9)8-4-1-2-6-10(8)14-11/h1-7H
- Synonyms
- 1-CHLORODIBENZOFURAN|1-Chlorodibenzo[b,d]furan|84761-86-4|Chlorodibenzofuran|Dibenzofuran, 1-chloro|00SD1U3FL3|CCRIS ...
- 5-Oxo-5-(2-thienyl)valeric acidCAS: 22971-62-6 Formula: C9H10O3S Molecular Weight: 198.24● In Stock — US warehouse, ships to EU* Item #: O341390View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 5-oxo-5-thiophen-2-ylpentanoic acid
- SMILES
- C1=CSC(=C1)C(=O)CCCC(=O)O
- InChIKey
- GSQMRVFOHNXKOR-UHFFFAOYSA-N
- InChI
- 1S/C9H10O3S/c10-7(3-1-5-9(11)12)8-4-2-6-13-8/h2,4,6H,1,3,5H2,(H,11,12)
- Synonyms
- 5-(thien-2-yl)-5-oxopentanoic acid | A24242 | FT-0616563 | 5-Oxo-5-(thiophen-2-yl)pentanoic acid | 2-Thiophenepentano...
- 1H-Imidazo[4,5-b]pyridine-2-thiol● In Stock — US warehouse, ships to EU* Item #: H332511View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 1,3-dihydroimidazo[4,5-b]pyridine-2-thione
- SMILES
- C1=CC2=C(NC(=S)N2)N=C1
- InChIKey
- ZLYRPVTXHARSPL-UHFFFAOYSA-N
- InChI
- 1S/C6H5N3S/c10-6-8-4-2-1-3-7-5(4)9-6/h1-3H,(H2,7,8,9,10)
- Synonyms
- 2H-Imidazo[4,5-b]pyridine-2-thione, 1,3-dihydro- | A1-00572 | NSC 403067 | S11897 | AKOS016002762 | CCG-321764 | 1,3-...
- 1H-Imidazole-1-sulfonyl azide, hydrochlorideCAS: 952234-36-5 Formula: C3H4ClN5O2S Molecular Weight: 209.61● In Stock — US warehouse, ships to EU* Item #: H305026View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- N-diazoimidazole-1-sulfonamide;hydrochloride
- SMILES
- C1=CN(C=N1)S(=O)(=O)N=[N+]=[N-].Cl
- InChIKey
- XYURSCOGYWBRDR-UHFFFAOYSA-N
- InChI
- 1S/C3H3N5O2S.ClH/c4-6-7-11(9,10)8-2-1-5-3-8;/h1-3H;1H
- Synonyms
- A854679 | 1H-Imidazole-1-sulfonyl Azide HCl | AKOS016015616 | BS-13556 | Imidazole-1-sulfonyl azide hydrochloride | 1...
- 1H-Indole-4-carbothioic acid amide● In Stock — US warehouse, ships to EU* Item #: H331523View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 1H-indole-4-carbothioamide
- SMILES
- C1=CC(=C2C=CNC2=C1)C(=S)N
- InChIKey
- REPRZHLDHBWJIJ-UHFFFAOYSA-N
- InChI
- 1S/C9H8N2S/c10-9(12)7-2-1-3-8-6(7)4-5-11-8/h1-5,11H,(H2,10,12)
- Synonyms
- 1H-INDOLE-4-CARBOTHIOICACIDAMIDE | AB28296 | A862105 | AKOS006294626 | 1H-INDOLE-4-CARBOTHIOIC ACID AMIDE | FT-069109...
- 1H-Indole-4-carboxylic acid hydrazideCAS: 885272-22-0 Formula: C9H9N3O Molecular Weight: 175.19● In Stock — US warehouse, ships to EU* Item #: H331524View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 1H-indole-4-carbohydrazide
- SMILES
- C1=CC(=C2C=CNC2=C1)C(=O)NN
- InChIKey
- VFWVCNABVVHCKS-UHFFFAOYSA-N
- InChI
- 1S/C9H9N3O/c10-12-9(13)7-2-1-3-8-6(7)4-5-11-8/h1-5,11H,10H2,(H,12,13)
- Synonyms
- FT-0763876 | AKOS009458928 | CYSTEICACID | 1H-Indole-4-carboxylic acid, hydrazide | J-504707 | BL000525 | SS-6024 | 1...
![[Tyr8]-Substance P - ≥95%, used for , CAS No. 55614-10-3, by Aladdin Scientific](https://www.aladdinsci.com/media/catalog/product/cache/6360e336b2a70951114dbd37294096ee/T/2/T275382.png)
![1-chlorodibenzo[b,d]furan - ≥99% CAS No(84761-86-4) by Aladdin Scientific](https://www.aladdinsci.com/media/catalog/product/cache/6360e336b2a70951114dbd37294096ee/C/3/C304762.png)
![1H-Imidazo[4,5-b]pyridine-2-thiol - ≥97% CAS No(29448-81-5) by Aladdin Scientific](https://www.aladdinsci.com/media/catalog/product/cache/6360e336b2a70951114dbd37294096ee/H/3/H332511.png)
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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.