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
- Caffeine-d9Solid ≥98 atom% D,≥98%● In Stock — US warehouse, ships to EU* Item #: C334918View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 1,3,7-tris(trideuteriomethyl)purine-2,6-dione
- SMILES
- O=C(N(C([2H])([2H])[2H])C1=O)N(C2=C1N(C([2H])([2H])[2H])C=N2)C([2H])([2H])[2H]
- InChIKey
- RYYVLZVUVIJVGH-GQALSZNTSA-N
- InChI
- 1S/C8H10N4O2/c1-10-4-9-6-5(10)7(13)12(3)8(14)11(6)2/h4H,1-3H3/i1D3,2D3,3D3
- Synonyms
- 1,3,7-tris(trideuteriomethyl)purine-2,6-dione | d9-caffeine | Caffeine-d9 | Caffeine-[d9] | Caffeine-(trimethyl-d9)
- Calceolarioside BCAS: 105471-98-5 Formula: C23H26O11 Molecular Weight: 478.46● In Stock — US warehouse, ships to EU* Item #: C414362View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- [(2R,3S,4S,5R,6R)-6-[2-(3,4-dihydroxyphenyl)ethoxy]-3,4,5-trihydroxyoxan-2-yl]methyl (E)-3-(3,4-dihydroxyphenyl)prop-2-enoate
- SMILES
- C1=CC(=C(C=C1CCOC2C(C(C(C(O2)COC(=O)C=CC3=CC(=C(C=C3)O)O)O)O)O)O)O
- InChIKey
- LFKQVVDFNHDYNK-FOXCETOMSA-N
- InChI
- show more
- Synonyms
- b-D-Glucopyranoside,2-(3,4-dihydroxyphenyl)ethyl, 6-[(2E)-3-(3,4-dihydroxyphenyl)-2-propenoate];Calceolarioside B | M...
- Caftaric Acid● In Stock — US warehouse, ships to EU* Item #: C347201View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (2R,3R)-2-[(E)-3-(3,4-dihydroxyphenyl)prop-2-enoyl]oxy-3-hydroxybutanedioic acid
- SMILES
- C1=CC(=C(C=C1C=CC(=O)OC(C(C(=O)O)O)C(=O)O)O)O
- InChIKey
- SWGKAHCIOQPKFW-JTNORFRNSA-N
- InChI
- 1S/C13H12O9/c14-7-3-1-6(5-8(7)15)2-4-9(16)22-11(13(20)21)10(17)12(18)19/h1-5,10-11,14-15,17H,(H,18,19)(H,20,21)/b4-2+/t10-,11-/m1/s1
- Synonyms
- Caftaric acid , HPLC Grade | Q-100761 | Caftaric acid, analytical standard | Butanedioic acid, 2-(((2E)-3-(3,4-dihydr...
- Calpeptin, Inhibitor of calpain 1;Inhibitor of cathepsin KCAS: 117591-20-5 Formula: C20H30N2O4 Molecular Weight: 362.47Moligand™ ? Moligand™ — Aladdin's line of ligands and bioactive small molecules. Use for receptor, pathway, and binding studies needing defined small-molecule tools. 10mM in DMSO● In Stock — US warehouse, ships to EU* Item #: C420784View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- benzyl N-[(2S)-4-methyl-1-oxo-1-[[(2S)-1-oxohexan-2-yl]amino]pentan-2-yl]carbamate
- SMILES
- CCCCC(C=O)NC(=O)C(CC(C)C)NC(=O)OCC1=CC=CC=C1
- InChIKey
- PGGUOGKHUUUWAF-ROUUACIJSA-N
- InChI
- show more
- Synonyms
- Isopentanal | KBio3_000476 | Benzylcarbonyl-leu-nleu-H | EX-A2217 | HMS3675M09 | IDI1_033988 | N-benzyloxycarbonyl-L-...
- Calciseptine (Recombinant)CAS: 178805-91-9 Formula: C304H477N91O88S11 Molecular Weight: 7167.4◐ .Made to order · 8–12 wks Item #: C274640View ProductPricing & Pack Sizes
Technical Identifiers
- Calhex 231 hydrochloride◐ .Made to order · 8–12 wks Item #: C287996View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 4-chloro-N-[(1S,2S)-2-[[(1R)-1-naphthalen-1-ylethyl]amino]cyclohexyl]benzamide;hydrochloride
- SMILES
- CC(C1=CC=CC2=CC=CC=C21)NC3CCCCC3NC(=O)C4=CC=C(C=C4)Cl.Cl
- InChIKey
- KZPHZSFSFANQIS-GRFVZBLOSA-N
- InChI
- show more
- Synonyms
- 4-Chloro-N-[(1S,2S)-2-[[(1R)-1-(1-naphthalenyl)ethyl]amino]cyclohexyl]-benzamide hydrochloride
- Calmodulin from bovine testesCAS: 77107-46-1● In Stock — US warehouse, ships to EU* Item #: C140110View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- CaM, Phosphodiesterase 3′:5′-cyclic nucleotide activator
- Calcipotriol, Vitamin D receptor agonistMoligand™ ? Moligand™ — Aladdin's line of ligands and bioactive small molecules. Use for receptor, pathway, and binding studies needing defined small-molecule tools. 10mM in DMSO● In Stock — US warehouse, ships to EU* Item #: C420670View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- show more
- SMILES
- CC(C=CC(C1CC1)O)C2CCC3C2(CCCC3=CC=C4CC(CC(C4=C)O)O)C
- InChIKey
- LWQQLNNNIPYSNX-UROSTWAQSA-N
- InChI
- show more
- Synonyms
- MC 903 | CALCIPOTRIOL [JAN] | (1S,3R,5Z,7E,22E,24S)-26,27-cyclo-9,10-secocholesta-5,7,10,22-tetraene-1,3,24-triol | C...
- Calcitonin, eelCAS: 57014-02-5(free base) Formula: C146H241N43O47S2 Molecular Weight: 3414.87（without TFA）● In Stock — US warehouse, ships to EU* Item #: C118787View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- Thyrocalcitonin eel TFA
- Calcitriol (RO215535), Agonist of Vitamin D receptorMoligand™ ? Moligand™ — Aladdin's line of ligands and bioactive small molecules. Use for receptor, pathway, and binding studies needing defined small-molecule tools. 10mM in DMSO● In Stock — US warehouse, ships to EU* Item #: C409109View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- Topitriol, 1,25-Dihydroxyvitamin D3 | (1R,3S,Z)-5-((E)-2-((1R,3aS,7aR)-1-((R)-6-hydroxy-6-methylheptan-2-yl)-7a-methy...
- Calcium Benzoate TrihydrateCAS: 5743-30-6 Formula: C14H10CaO4·3H2O Molecular Weight: 336.35● In Stock — US warehouse, ships to EU* Item #: C347199View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- calcium;dibenzoate;trihydrate
- SMILES
- C1=CC=C(C=C1)C(=O)[O-].C1=CC=C(C=C1)C(=O)[O-].O.O.O.[Ca+2]
- InChIKey
- HZQXCUSDXIKLGS-UHFFFAOYSA-L
- InChI
- 1S/2C7H6O2.Ca.3H2O/c2*8-7(9)6-4-2-1-3-5-6;;;;/h2*1-5H,(H,8,9);;3*1H2/q;;+2;;;/p-2
- Synonyms
- 209829NC6Z | calcium;dibenzoate;trihydrate | UNII-209829NC6Z | Calciumbenzoate | DTXSID30206018 | Q27253456 | Benzoic...
- Calcium D-PanthotenateLiquid 10mM in DMSO● In Stock — US warehouse, ships to EU* Item #: C408743View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- D-Pantothenic Acid Calcium | N-[(2R)-2,4-dihydroxy-3,3-dimethyl-1-oxobutyl]-β-alanine,calcium salt (2:1)
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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.