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
Shop by category
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
- N-MPPP Hydrochloride◐ .Made to order · 8–12 wks Item #: N287810View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- N-methyl-2-phenyl-N-(1-phenyl-2-pyrrolidin-1-ylethyl)acetamide;hydrochloride
- SMILES
- CN(C(CN1CCCC1)C2=CC=CC=C2)C(=O)CC3=CC=CC=C3.Cl
- InChIKey
- BJJKMJWQLJIRGF-UHFFFAOYSA-N
- InChI
- 1S/C21H26N2O.ClH/c1-22(21(24)16-18-10-4-2-5-11-18)20(17-23-14-8-9-15-23)19-12-6-3-7-13-19;/h2-7,10-13,20H,8-9,14-17H2,1H3;1H
- Synonyms
- AKOS024458648 | N-methyl-2-phenyl-N-(1-phenyl-2-pyrrolidin-1-ylethyl)acetamide;hydrochloride | N-MPPP Hydrochloride |...
- Fmoc-3-chloro-D-beta-homophenylalanine● In Stock — US warehouse, ships to EU* Item #: F338306View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (3R)-4-(3-chlorophenyl)-3-(9H-fluoren-9-ylmethoxycarbonylamino)butanoic acid
- SMILES
- C1=CC=C2C(=C1)C(C3=CC=CC=C32)COC(=O)NC(CC4=CC(=CC=C4)Cl)CC(=O)O
- InChIKey
- MAKZBMVPIFVGPV-GOSISDBHSA-N
- InChI
- show more
- Synonyms
- (3R)-4-(3-chlorophenyl)-3-(9H-fluoren-9-ylmethoxycarbonylamino)butanoic acid | Fmoc-(R)-3-Amino-4-(3-chlorophenyl)but...
- LED209CAS: 245342-14-7 Formula: C19H17N3O2S2 Molecular Weight: 383.49Solid 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 #: L349122View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 1-phenyl-3-[4-(phenylsulfamoyl)phenyl]thiourea
- SMILES
- C1=CC=C(C=C1)NC(=S)NC2=CC=C(C=C2)S(=O)(=O)NC3=CC=CC=C3
- InChIKey
- HNDRSTUKPCLQLT-UHFFFAOYSA-N
- InChI
- 1S/C19H17N3O2S2/c23-26(24,22-17-9-5-2-6-10-17)18-13-11-16(12-14-18)21-19(25)20-15-7-3-1-4-8-15/h1-14,22H,(H2,20,21,25)
- Synonyms
- LED-209;LED 209 | AC-35928 | SCHEMBL3396831 | C74263 | Benzenesulphonamide, N-phenyl-4-(((phenylamino)thioxomethyl)am...
- N-Methyl-4-aminobutyric acidCAS: 1119-48-8 Formula: C5H11NO2 Molecular Weight: 117.15● In Stock — US warehouse, ships to EU* Item #: M276212View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 4-(methylamino)butanoic acid
- SMILES
- CNCCCC(=O)O
- InChIKey
- AOKCDAVWJLOAHG-UHFFFAOYSA-N
- InChI
- 1S/C5H11NO2/c1-6-4-2-3-5(7)8/h6H,2-4H2,1H3,(H,7,8)
- Synonyms
- 3LC3P8KU3H | AMY5046 | J-002673 | gamma-methylaminobutyric acid | Viticolor | dihydroxyacetone 3-phosphate | N,N-Dime...
- XL888CAS: 1149705-71-4 Formula: C29H37N5O3 Molecular Weight: 503.64● In Stock — US warehouse, ships to EU* Item #: X129726View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2-[[(2R)-butan-2-yl]amino]-4-N-[8-[5-(cyclopropanecarbonyl)pyridin-2-yl]-8-azabicyclo[3.2.1]octan-3-yl]-5-methylbenzene-1,4-dicarboxamide
- SMILES
- CCC(C)NC1=C(C=C(C(=C1)C(=O)NC2CC3CCC(C2)N3C4=NC=C(C=C4)C(=O)C5CC5)C)C(=O)N
- InChIKey
- LHGWWAFKVCIILM-LAQKFSSHSA-N
- InChI
- show more
- Synonyms
- 1,4-Benzenedicarboxamide, N1-[(3-endo)-8-[5-(cyclopropylcarbonyl)-2-pyridinyl]-8-azabicyclo[3.2.1]oct-3-yl]-2-methyl-...
- XMD 8-87● In Stock — US warehouse, ships to EU* Item #: X286879View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2-[2-methoxy-4-(4-methylpiperazin-1-yl)anilino]-11-methyl-5H-pyrimido[4,5-b][1,4]benzodiazepin-6-one
- SMILES
- CN1CCN(CC1)C2=CC(=C(C=C2)NC3=NC=C4C(=N3)N(C5=CC=CC=C5C(=O)N4)C)OC
- InChIKey
- LGLHCXISMKHLIK-UHFFFAOYSA-N
- InChI
- show more
- Synonyms
- 5,11-Dihydro-2-[[2-methoxy-4-(4-methyl-1-piperazinyl)phenyl]amino]-11-methyl-6H-pyrimido[4,5-b][1,4]benzodiazepin-6-one
- LDN 193188CAS: 1267610-30-9 Formula: C20H17Cl2N5O4S Molecular Weight: 494.35● In Stock — US warehouse, ships to EU* Item #: L287465View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2,4-dichloro-N-[[4-[(4,6-dimethylpyrimidin-2-yl)sulfamoyl]phenyl]carbamoyl]benzamide
- SMILES
- CC1=CC(=NC(=N1)NS(=O)(=O)C2=CC=C(C=C2)NC(=O)NC(=O)C3=C(C=C(C=C3)Cl)Cl)C
- InChIKey
- COTBDKMEUUNJTI-UHFFFAOYSA-N
- InChI
- show more
- Synonyms
- 2,4-Dichloro-N-[[[4-[[(4,6-dimethyl-2-pyrimidinyl)amino]sulfonyl]phenyl]amino]carbonyl]benzamide
- Xamoterol hemifumarateCAS: 73210-73-8 EC Number: 277-319-9 PubChem CID: 6440459 Formula: C16H25N3O5.0.5C4H4O4 Molecular Weight: 397.43● In Stock — US warehouse, ships to EU* Item #: X275585View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (E)-but-2-enedioic acid;N-[2-[[2-hydroxy-3-(4-hydroxyphenoxy)propyl]amino]ethyl]morpholine-4-carboxamide
- SMILES
- C1COCCN1C(=O)NCCNCC(COC2=CC=C(C=C2)O)O.C1COCCN1C(=O)NCCNCC(COC2=CC=C(C=C2)O)O.C(=CC(=O)O)C(=O)O
- InChIKey
- QEDVGROSOZBGOZ-WXXKFALUSA-N
- InChI
- show more
- Synonyms
- HMS3714J08 | AKOS024458711 | Xamoterol hemifumarate | XAMOTEROL FUMARATE | 4-MORPHINOLINECARBOXAMIDE, N-*(2-((2-HYDRO...
- Fmoc-2-bromo-D-beta-homophenylalanine● In Stock — US warehouse, ships to EU* Item #: F337550View ProductPricing & Pack Sizes
Technical Identifiers
- SMILES
- C1=CC=C(C(=C1)C[C@H](CC(=O)O)NC(=O)OCC2C3=CC=CC=C3C4=CC=CC=C24)Br
- Synonyms
- Fmoc-D-3-Amino-4-(2-bromophenyl)butyric acid
- Fmoc-2-bromo-L-beta-homophenylalanine● In Stock — US warehouse, ships to EU* Item #: F338063View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (3S)-4-(2-bromophenyl)-3-(9H-fluoren-9-ylmethoxycarbonylamino)butanoic acid
- SMILES
- C1=CC=C(C(=C1)CC(CC(=O)O)NC(=O)OCC2C3=CC=CC=C3C4=CC=CC=C24)Br
- InChIKey
- WLVUAXHMNMNOKU-KRWDZBQOSA-N
- InChI
- show more
- Synonyms
- (bS)-2-Bromo-b-[[(9H-fluoren-9-ylmethoxy)carbonyl]amino]nenzenebutanoic acid | AC-25449 | EN300-12612680 | Fmoc-2-bro...
- Fmoc-2-chloro-D-beta-homophenylalanine● In Stock — US warehouse, ships to EU* Item #: F338554View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (3R)-4-(2-chlorophenyl)-3-(9H-fluoren-9-ylmethoxycarbonylamino)butanoic acid
- SMILES
- C1=CC=C(C(=C1)CC(CC(=O)O)NC(=O)OCC2C3=CC=CC=C3C4=CC=CC=C24)Cl
- InChIKey
- RTGMPAHEDKUNFP-QGZVFWFLSA-N
- InChI
- show more
- Synonyms
- Fmoc-(R)-3-Amino-4-(2-chlorophenyl)butyric acid | (R)-N-(9-Fluorenylmethyloxycarbonyl)-3-amino-4-(2-chlorophenyl)buty...
- LDN 212320CAS: 894002-50-7 Formula: C17H15N3S Molecular Weight: 293.39● In Stock — US warehouse, ships to EU* Item #: L287431View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 3-[(2-methylphenyl)methylsulfanyl]-6-pyridin-2-ylpyridazine
- SMILES
- CC1=CC=CC=C1CSC2=NN=C(C=C2)C3=CC=CC=N3
- InChIKey
- DUUQLWDHNYFUPP-UHFFFAOYSA-N
- InChI
- 1S/C17H15N3S/c1-13-6-2-3-7-14(13)12-21-17-10-9-16(19-20-17)15-8-4-5-11-18-15/h2-11H,12H2,1H3
- Synonyms
- 3-[[(2-Methylphenyl)methyl]thio]-6-(2-pyridinyl)-pyridazine | LDN-212320 | LDN/OSU-0212320, LDN-0212320, OSU-0212320 ...
Fast Shipping Same-day shipping on in-stock items
Technical Details Quality & specification info on every product page
Pack Size Options Multiple packaging sizes with pricing access from listing
R&D Use Only Products supplied for research and development use
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.