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
- DL-AP3CAS: 5652-28-8 Formula: C3H8NO5P Molecular Weight: 169.07● In Stock — US warehouse, ships to EU* Item #: D286664View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2-amino-3-phosphonopropanoic acid
- SMILES
- C(C(C(=O)O)N)P(=O)(O)O
- InChIKey
- LBTABPSJONFLPO-UHFFFAOYSA-N
- InChI
- 1S/C3H8NO5P/c4-2(3(5)6)1-10(7,8)9/h2H,1,4H2,(H,5,6)(H2,7,8,9)
- Synonyms
- DL-2-Amino-3-phosphonopropionic acid (AP3) | NSC133887 | DTXSID40863590 | 2-Amino-3-phosphonopropionate | 2-AP3 | A 4...
- DL-AP4CAS: 6323-99-5 Formula: C4H10NO5P Molecular Weight: 183.1Moligand™ ? Moligand™ — Aladdin's line of ligands and bioactive small molecules. Use for receptor, pathway, and binding studies needing defined small-molecule tools. ≥98%(HPLC)● In Stock — US warehouse, ships to EU* Item #: D287137View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2-amino-4-phosphonobutanoic acid
- SMILES
- C(CP(=O)(O)O)C(C(=O)O)N
- InChIKey
- DDOQBQRIEWHWBT-UHFFFAOYSA-N
- InChI
- 1S/C4H10NO5P/c5-3(4(6)7)1-2-11(8,9)10/h3H,1-2,5H2,(H,6,7)(H2,8,9,10)
- Synonyms
- NSC 30079 | NSC 354086 | 2 APB | 2-Amino-4-phosphonobutyric acid | 2-Amino-4-phosphono-butyric acid | BRN 5255932 | H...
- DL-Alanyl-L-alanineCAS: 59247-16-4 Formula: C6H12N2O3 Molecular Weight: 160.17● In Stock — US warehouse, ships to EU* Item #: D351355View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (2S)-2-(2-aminopropanoylamino)propanoic acid
- SMILES
- CC(C(=O)NC(C)C(=O)O)N
- InChIKey
- DEFJQIDDEAULHB-BKLSDQPFSA-N
- InChI
- 1S/C6H12N2O3/c1-3(7)5(9)8-4(2)6(10)11/h3-4H,7H2,1-2H3,(H,8,9)(H,10,11)/t3?,4-/m0/s1
- Synonyms
- dl-Alanyl-l-alanine | AS-65000 | DTXSID50659845 | H-DL-Ala-Ala-OH | AKOS015854504 | (2S)-2-(2-Aminopropanamido)propan...
- DL-aspartic acid magnesium saltCAS: 7018-07-7 Formula: C8H12MgN2O8 · 4H2O Molecular Weight: 360.56● In Stock — Germany Item #: D351328View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- magnesium;(2S)-2-aminobutanedioate;tetrahydrate
- SMILES
- C(C(C(=O)[O-])N)C(=O)[O-].O.O.O.O.[Mg+2]
- InChIKey
- DFWMIGMDISTQBJ-PUAMRSTPSA-L
- InChI
- 1S/C4H7NO4.Mg.4H2O/c5-2(4(8)9)1-3(6)7;;;;;/h2H,1,5H2,(H,6,7)(H,8,9);;4*1H2/q;+2;;;;/p-2/t2-;;;;;/m0...../s1
- Synonyms
- Magnesiumaspartat-trihydrat | magnesium;(2S)-2-aminobutanedioate;tetrahydrate | Magnesium aspartate tetrahydrate
- DL-Carbidopa (Carbidopa)CAS: 302-53-4 Formula: C10H14N2O4 Molecular Weight: 226.23Solid Moligand™ ? Moligand™ — Aladdin's line of ligands and bioactive small molecules. Use for receptor, pathway, and binding studies needing defined small-molecule tools. ≥97%◐ .Made to order · 8–12 wks Item #: D275777View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 3-(3,4-dihydroxyphenyl)-2-hydrazinyl-2-methylpropanoic acid
- SMILES
- CC(CC1=CC(=C(C=C1)O)O)(C(=O)O)NN
- InChIKey
- TZFNLOMSOLWIDK-UHFFFAOYSA-N
- InChI
- 1S/C10H14N2O4/c1-10(12-11,9(15)16)5-6-2-3-7(13)8(14)4-6/h2-4,12-14H,5,11H2,1H3,(H,15,16)
- Synonyms
- Benzenepropanoic acid, alpha-hydrazino-3,4-dihydroxy-alpha-methyl- | S-(-)-Carbidopa, >=98% (TLC), powder | Spectrum_...
- DL-Arginine monohydrochloride monohydrate● In Stock — US warehouse, ships to EU* Item #: D351356View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2-amino-5-(diaminomethylideneamino)pentanoic acid;hydrate;hydrochloride
- SMILES
- C(CC(C(=O)O)N)CN=C(N)N.O.Cl
- InChIKey
- NUFCANQNMWVENN-UHFFFAOYSA-N
- InChI
- 1S/C6H14N4O2.ClH.H2O/c7-4(5(11)12)2-1-3-10-6(8)9;;/h4H,1-3,7H2,(H,11,12)(H4,8,9,10);1H;1H2
- Synonyms
- dl-arginine hydrochloride monohydrate | Dl-Arginine Hydrochloride Hydrate | 2-Amino-5-guanidinopentanoic acid hydroch...
- DL-CarnitineCAS: 461-06-3 Formula: C7H15NO3 Molecular Weight: 161.2● In Stock — US warehouse, ships to EU* Item #: D413371View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 3-hydroxy-4-(trimethylazaniumyl)butanoate
- SMILES
- C[N+](C)(C)CC(CC(=O)[O-])O
- InChIKey
- PHIQHXFUZVPYII-UHFFFAOYSA-N
- InChI
- 1S/C7H15NO3/c1-8(2,3)5-6(9)4-7(10)11/h6,9H,4-5H2,1-3H3
- Synonyms
- (±)-Carnitin1-Propanaminium,3-carboxy-2-hydroxy-N,N,N-trimethyl-,inner salt | Carnitina | Carnitine
- DL-CarnitineCAS: 461-06-3 Formula: C7H15NO3 Molecular Weight: 161.210mM in DMSO● In Stock — US warehouse, ships to EU* Item #: D424086View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 3-hydroxy-4-(trimethylazaniumyl)butanoate
- SMILES
- C[N+](C)(C)CC(CC(=O)[O-])O
- InChIKey
- PHIQHXFUZVPYII-UHFFFAOYSA-N
- InChI
- 1S/C7H15NO3/c1-8(2,3)5-6(9)4-7(10)11/h6,9H,4-5H2,1-3H3
- Synonyms
- DL-Carnitine|Carnitine|406-76-8|L(-)-Carnitine|461-06-3|Carnitine DL-form|Carnitine [INN]|Carnitina|3-hydroxy-4-(trim...
- DL-Carnitine HClLiquid 10mM in DMSO● In Stock — US warehouse, ships to EU* Item #: D408460View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- 3-carboxy-2-hydroxy-N,N,N-trimethyl-1-propanaminium,chloride (1:1)
- DL-Goitrin, Agonist of TAS2R38Moligand™ ? 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 #: D421234View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 5-ethenyl-1,3-oxazolidine-2-thione
- SMILES
- C=CC1CNC(=S)O1
- InChIKey
- UZQVYLOFLQICCT-UHFFFAOYSA-N
- InChI
- 1S/C5H7NOS/c1-2-4-3-6-5(8)7-4/h2,4H,1,3H2,(H,6,8)
- Synonyms
- LS-13042 | 2-OXAZOLIDINETHIONE, 5-ETHENYL-, (5S)- | s3251 | SCHEMBL340219 | 2-OXAZOLIDINETHIONE, 5-VINYL- | 5-vinylox...
- DL-AP7CAS: 78966-69-5 Formula: C7H16NO5P Molecular Weight: 225.18◐ .Made to order · 8–12 wks Item #: D335870View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2-amino-7-phosphonoheptanoic acid
- SMILES
- C(CCC(C(=O)O)N)CCP(=O)(O)O
- InChIKey
- MYDMWESTDPJANS-UHFFFAOYSA-N
- InChI
- 1S/C7H16NO5P/c8-6(7(9)10)4-2-1-3-5-14(11,12)13/h6H,1-5,8H2,(H,9,10)(H2,11,12,13)
- Synonyms
- D-200 | Tox21_500008 | (+/-)-2-Amino-7-phosphonoheptanoic acid | AKOS005066193 | MYDMWESTDPJANS-UHFFFAOYSA-N | PDSP2_...
- DL-PenicillamineLiquid 10mM in Water● In Stock — US warehouse, ships to EU* Item #: D424522View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2-amino-3-methyl-3-sulfanylbutanoic acid
- SMILES
- CC(C)(C(C(=O)O)N)S
- InChIKey
- VVNCNSJFMMFHPL-UHFFFAOYSA-N
- InChI
- 1S/C5H11NO2S/c1-5(2,9)3(6)4(7)8/h3,9H,6H2,1-2H3,(H,7,8)
- Synonyms
- (+-)-Penicillamine | CCG-40247 | CHEBI:50868 | 2-amino-3-methyl-3-sulfanylbutanoic acid | 2-amino-3-methyl-3-sulfanyl...
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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.