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
102,635Explore 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)
19,700Find 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
- Acetyl-L-leucine methyl amideCAS: 32483-15-1 Formula: C9H18N2O2 Molecular Weight: 186.25● In Stock — US warehouse, ships to EU* Item #: A332477View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (2S)-2-acetamido-N,4-dimethylpentanamide
- SMILES
- CC(C)CC(C(=O)NC)NC(=O)C
- InChIKey
- GFQFFCFJVLJXRY-QMMMGPOBSA-N
- InChI
- 1S/C9H18N2O2/c1-6(2)5-8(9(13)10-4)11-7(3)12/h6,8H,5H2,1-4H3,(H,10,13)(H,11,12)/t8-/m0/s1
- Synonyms
- (2S)-2-(acetylamino)-N,4-dimethylpentanamide | DTXSID40426220 | DL-Acetylleucine N-methylamide | Acetyl-L-leucine met...
- AGI-6780CAS: 1432660-47-3 Formula: C21H18F3N3O3S2 Molecular Weight: 481.51Solid ≥98%● In Stock — US warehouse, ships to EU* Item #: A124933View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 1-[5-(cyclopropylsulfamoyl)-2-thiophen-3-ylphenyl]-3-[3-(trifluoromethyl)phenyl]urea
- SMILES
- C1CC1NS(=O)(=O)C2=CC(=C(C=C2)C3=CSC=C3)NC(=O)NC4=CC=CC(=C4)C(F)(F)F
- InChIKey
- CCAWRGNYALGPQH-UHFFFAOYSA-N
- InChI
- show more
- Synonyms
- AC-35210 | AGI 6780 | SW220033-1 | N-cyclopropyl-4-(thiophen-3-yl)-3-(3-(3-(trifluoromethyl)phenyl)ureido)benzenesulf...
- Acetylthiocholine chloride● In Stock — US warehouse, ships to EU* Item #: A113536View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2-acetylsulfanylethyl(trimethyl)azanium;chloride
- SMILES
- CC(=O)SCC[N+](C)(C)C.[Cl-]
- InChIKey
- GZYVLKKMMDFCKR-UHFFFAOYSA-M
- InChI
- 1S/C7H16NOS.ClH/c1-7(9)10-6-5-8(2,3)4;/h5-6H2,1-4H3;1H/q+1;/p-1
- Synonyms
- NCGC00093572-01 | SR-01000075669-1 | Acetylthiocholine chloride | FT-0635956 | MLS001056723 | (2-Mercaptoethyl)trimet...
- SB 243213 dihydrochloride◐ .Made to order · 8–12 wks Item #: S288863View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 5-methyl-N-[6-(2-methylpyridin-3-yl)oxypyridin-3-yl]-6-(trifluoromethyl)-2,3-dihydroindole-1-carboxamide;dihydrochloride
- SMILES
- CC1=CC2=C(C=C1C(F)(F)F)N(CC2)C(=O)NC3=CN=C(C=C3)OC4=C(N=CC=C4)C.Cl.Cl
- InChIKey
- UKMTYUXWLKQDNT-UHFFFAOYSA-N
- InChI
- show more
- Synonyms
- 2,3-Dihydro-5-methyl-N-[6-[(2-methyl-3-pyridinyl)oxy]-3-pyridinyl]-6-(trifluoromethyl)-1H-Indole-1-carboxamide dihydr...
- Acetyl-L-methionine alpha-naphthyl ester● In Stock — US warehouse, ships to EU* Item #: A354264View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- naphthalen-1-yl (2S)-2-acetamido-4-methylsulfanylbutanoate
- SMILES
- CC(=O)NC(CCSC)C(=O)OC1=CC=CC2=CC=CC=C21
- InChIKey
- FGHRSVXVKOEYHM-HNNXBMFYSA-N
- InChI
- 1S/C17H19NO3S/c1-12(19)18-15(10-11-22-2)17(20)21-16-9-5-7-13-6-3-4-8-14(13)16/h3-9,15H,10-11H2,1-2H3,(H,18,19)/t15-/m0/s1
- Synonyms
- N-acetyl-l-methionine-1-naphthylester | N-Acetylmethionine alpha-naphthyl ester | Ac-Methionine-alpha-naphthyl ester ...
- Acetyl-L-methionine amideCAS: 23361-37-7 Formula: C7H14N2O2S Molecular Weight: 190.26● In Stock — US warehouse, ships to EU* Item #: A352728View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (2S)-2-acetamido-4-methylsulfanylbutanamide
- SMILES
- CC(=O)NC(CCSC)C(=O)N
- InChIKey
- AJQATZBTQNYZFO-LURJTMIESA-N
- InChI
- 1S/C7H14N2O2S/c1-5(10)9-6(7(8)11)3-4-12-2/h6H,3-4H2,1-2H3,(H2,8,11)(H,9,10)/t6-/m0/s1
- Acetyl-L-tyrosine hydrazideCAS: 2381-07-9 Formula: C11H15N3O3 Molecular Weight: 237.26● In Stock — US warehouse, ships to EU* Item #: A333124View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- N-[(2S)-1-hydrazinyl-3-(4-hydroxyphenyl)-1-oxopropan-2-yl]acetamide
- SMILES
- CC(=O)NC(CC1=CC=C(C=C1)O)C(=O)NN
- InChIKey
- CRZZRSWETKBGET-JTQLQIEISA-N
- InChI
- 1S/C11H15N3O3/c1-7(15)13-10(11(17)14-12)6-8-2-4-9(16)5-3-8/h2-5,10,16H,6,12H2,1H3,(H,13,15)(H,14,17)/t10-/m0/s1
- Synonyms
- N-acetyl-L-tyrosine hydrazide | N-[1-Hydrazino-3-(4-Hydroxyphenyl)-1-Oxo-2-Propanyl]Acetamide | Acetyl-L-tyrosine hyd...
- IKK-16 (hydrochloride)CAS: 1186195-62-9 Formula: C28H29N5OS • HCl Molecular Weight: 520.09Solid ≥98%● In Stock — US warehouse, ships to EU* Item #: I274699View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- [4-[[4-(1-benzothiophen-2-yl)pyrimidin-2-yl]amino]phenyl]-(4-pyrrolidin-1-ylpiperidin-1-yl)methanone;hydrochloride
- SMILES
- C1CCN(C1)C2CCN(CC2)C(=O)C3=CC=C(C=C3)NC4=NC=CC(=N4)C5=CC6=CC=CC=C6S5.Cl
- InChIKey
- XFVDIVQCZWDBCW-UHFFFAOYSA-N
- InChI
- show more
- Synonyms
- N-(4-Pyrrolidin-1-yl-piperidin-1-yl)-[4-(4-benzo[b]thiophen-2-yl-pyrimidin-2-ylamino)phenyl]carboxamidehydrochloride
- AIM-100CAS: 873305-35-2 Formula: C23H21N3O2 Molecular Weight: 371.43Solid 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 warehouse, ships to EU* Item #: A127060View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- N-[[(2S)-oxolan-2-yl]methyl]-5,6-diphenylfuro[2,3-d]pyrimidin-4-amine
- SMILES
- C1CC(OC1)CNC2=C3C(=C(OC3=NC=N2)C4=CC=CC=C4)C5=CC=CC=C5
- InChIKey
- XNFHHOXCDUAYSR-SFHVURJKSA-N
- InChI
- show more
- Synonyms
- 5,6-Diphenyl-N-[[(2S)-tetrahydro-2-furanyl]methyl]furo[2,3-d]pyrimidin-4-amine | YJB30535 | MLS006010340 | N-[[(2S)-o...
- AK-7CAS: 420831-40-9 Formula: C19H21BrN2O3S Molecular Weight: 437.35● In Stock — US warehouse, ships to EU* Item #: A274824View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 3-(azepan-1-ylsulfonyl)-N-(3-bromophenyl)benzamide
- SMILES
- C1CCCN(CC1)S(=O)(=O)C2=CC=CC(=C2)C(=O)NC3=CC(=CC=C3)Br
- InChIKey
- IYAYHZZWYNXHEQ-UHFFFAOYSA-N
- InChI
- 1S/C19H21BrN2O3S/c20-16-8-6-9-17(14-16)21-19(23)15-7-5-10-18(13-15)26(24,25)22-11-3-1-2-4-12-22/h5-10,13-14H,1-4,11-12H2,(H,21,23)
- Synonyms
- BS-16806 | C19H21BrN2O3S | HMS3886F07 | MLS006011706 | Q27255930 | AK 7 | EU-0004902 | DTXSID30194926 | SCHEMBL109572...
- Dermenkephalin● In Stock — US warehouse, ships to EU* Item #: D118806View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- show more
- SMILES
- CC(C)CC(C(=O)NC(CCSC)C(=O)NC(CC(=O)O)C(=O)N)NC(=O)C(CC1=CN=CN1)NC(=O)C(CC2=CC=CC=C2)NC(=O)C(CCSC)NC(=O)C(CC3=CC=C(C=C3)O)N
- InChIKey
- BHSURCCZOBVHJJ-NWOHMYAQSA-N
- InChI
- show more
- Synonyms
- Tyrosyl-methionyl-phenylalanyl-histidyl-leucyl-methionyl-aspartamide | L-alpha-Asparagine, L-tyrosyl-D-methionyl-L-ph...
- ProTx-I◐ .Made to order · 8–12 wks Item #: P276502View ProductPricing & Pack Sizes
Technical Identifiers
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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.