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).
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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
24,652Navigate 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
2,812PROTAC 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
102,662Explore 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)
19,717Find 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)
8,794Shop 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
- NAV 26CAS: 1198160-14-3 Formula: C22H21F3N2O4 Molecular Weight: 434.41● In Stock — US Item #: N287524View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2-(oxan-4-yl)-3-oxo-N-[[4-(trifluoromethoxy)phenyl]methyl]-1H-isoindole-1-carboxamide
- SMILES
- C1COCCC1N2C(C3=CC=CC=C3C2=O)C(=O)NCC4=CC=C(C=C4)OC(F)(F)F
- InChIKey
- ICGMZCVSHDKQTE-UHFFFAOYSA-N
- InChI
- 1S/C22H21F3N2O4/c23-22(24,25)31-16-7-5-14(6-8-16)13-26-20(28)19-17-3-1-2-4-18(17)21(29)27(19)15-9-11-30-12-10-15/h1-8,15,19H,9-13H2,(H,26,28)
- Synonyms
- 2,3-Dihydro-3-oxo-2-(tetrahydro-2H-pyran-4-yl)-N-[[4-(trifluoromethoxy)phenyl]methyl]-1H-isoindole-1-carboxamide
- PK-THPPSolid 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 #: P286893View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 1-[1-[6-(4-phenylbenzoyl)-7,8-dihydro-5H-pyrido[4,3-d]pyrimidin-4-yl]piperidin-4-yl]butan-1-one
- SMILES
- CCCC(=O)C1CCN(CC1)C2=NC=NC3=C2CN(CC3)C(=O)C4=CC=C(C=C4)C5=CC=CC=C5
- InChIKey
- CJZGRIRZVHNUSM-UHFFFAOYSA-N
- InChI
- show more
- Synonyms
- 1-[1-[6-([1,1′-Biphenyl]-4-ylcarbonyl)-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidin-4-yl]-4-piperidinyl]-1-butanone | PKT...
- Z-FA-FMKCAS: 105637-38-5 Formula: C21H23N2O4F Molecular Weight: 386.42● In Stock — US Item #: F275658View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- benzyl N-[(2S)-1-[[(2S)-4-fluoro-3-oxobutan-2-yl]amino]-1-oxo-3-phenylpropan-2-yl]carbamate
- SMILES
- CC(C(=O)CF)NC(=O)C(CC1=CC=CC=C1)NC(=O)OCC2=CC=CC=C2
- InChIKey
- ASXVEBPEZMSPHB-YJBOKZPZSA-N
- InChI
- show more
- Synonyms
- benzyl N-[(2S)-1-[[(2S)-4-fluoro-3-oxobutan-2-yl]amino]-1-oxo-3-phenylpropan-2-yl]carbamate | Z-Phe-Ala fluoromethyl ...
- Bisindolylmaleimide VIII acetateCAS: 138516-31-1 Formula: C24H22N4O2.CH3CO2H Molecular Weight: 458.51● In Stock — US Item #: B274850View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- acetic acid;3-[1-(3-aminopropyl)indol-3-yl]-4-(1-methylindol-3-yl)pyrrole-2,5-dione
- SMILES
- CC(=O)O.CN1C=C(C2=CC=CC=C21)C3=C(C(=O)NC3=O)C4=CN(C5=CC=CC=C54)CCCN
- InChIKey
- VEOXVBTXROWDAH-UHFFFAOYSA-N
- InChI
- show more
- Synonyms
- HMS3648M22 | Z2037279705 | Bis VIII acetate | Bis VIII acetateRo 31-7549 acetate | DTXSID50432099 | 1-(p-Fluorophenyl...
- Fmoc-cis-4-fluoro-Pro-OHCAS: 203866-19-7 Formula: C20H18FNO4 Molecular Weight: 355.37● In Stock — US Item #: F338837View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (2S,4S)-1-(9H-fluoren-9-ylmethoxycarbonyl)-4-fluoropyrrolidine-2-carboxylic acid
- SMILES
- C1C(CN(C1C(=O)O)C(=O)OCC2C3=CC=CC=C3C4=CC=CC=C24)F
- InChIKey
- CJEQUGHYFSTTQT-SGTLLEGYSA-N
- InChI
- 1S/C20H18FNO4/c21-12-9-18(19(23)24)22(10-12)20(25)26-11-17-15-7-3-1-5-13(15)14-6-2-4-8-16(14)17/h1-8,12,17-18H,9-11H2,(H,23,24)/t12-,18-/m0/s1
- Synonyms
- A879654 | EN300-657481 | (2S,4S)-1-{[(9H-fluoren-9-yl)methoxy]carbonyl}-4-fluoropyrrolidine-2-carboxylic acid | (2S,4...
- N-Cbz-DL-prolineSolid ≥98%● In Stock — US Item #: Z346674View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 1-phenylmethoxycarbonylpyrrolidine-2-carboxylic acid
- SMILES
- C1CC(N(C1)C(=O)OCC2=CC=CC=C2)C(=O)O
- InChIKey
- JXGVXCZADZNAMJ-UHFFFAOYSA-N
- InChI
- 1S/C13H15NO4/c15-12(16)11-7-4-8-14(11)13(17)18-9-10-5-2-1-3-6-10/h1-3,5-6,11H,4,7-9H2,(H,15,16)
- Synonyms
- Z-DL-Pro-OH | 1-[(benzyloxy)carbonyl]pyrrolidine-2-carboxylic acid | 1-(benzyloxycarbonyl)pyrrolidine-2-carboxylic acid
- Bis-PEG5-NHS esterCAS: 756526-03-1 Formula: C22H32N2O13 Molecular Weight: 532.50● In Stock — US Item #: B186438View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (2,5-dioxopyrrolidin-1-yl) 3-[2-[2-[2-[2-[3-(2,5-dioxopyrrolidin-1-yl)oxy-3-oxopropoxy]ethoxy]ethoxy]ethoxy]ethoxy]propanoate
- SMILES
- C1CC(=O)N(C1=O)OC(=O)CCOCCOCCOCCOCCOCCC(=O)ON2C(=O)CCC2=O
- InChIKey
- FTYUGLBWKRXQBD-UHFFFAOYSA-N
- InChI
- 1S/C22H32N2O13/c25-17-1-2-18(26)23(17)36-21(29)5-7-31-9-11-33-13-15-35-16-14-34-12-10-32-8-6-22(30)37-24-19(27)3-4-20(24)28/h1-16H2
- Synonyms
- Bis-dPEG(R)5-NHS ester | PEG5 BIS-NHS ESTER | AKOS027250858 | GS-6157 | BP-20429 | (2,5-dioxopyrrolidin-1-yl) 3-[2-[2...
- LY-333531 hydrochlorideCAS: 169939-93-9 Formula: C28H28N4O3 · HCl Molecular Weight: 505.01● In Stock — US Item #: L274839View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- show more
- SMILES
- CN(C)CC1CCN2C=C(C3=CC=CC=C32)C4=C(C5=CN(CCO1)C6=CC=CC=C65)C(=O)NC4=O.Cl
- InChIKey
- NYQIEYDJYFVLPO-FERBBOLQSA-N
- InChI
- show more
- Synonyms
- LY333531 HCl | (9S)-9-[(DiMethylaMino)Methyl]-6,7,10,11-tetrahydro-9H,18H-5,21:12,17-DiMethenodibenzo[e,k]pyrrolo[3,4...
- Z-ATAD-FMKFormula: C23H31F1N4O9 Molecular Weight: 526.50● In Stock — US Item #: A276120View ProductPricing & Pack Sizes
Technical Identifiers
- Fmoc-Nim-Boc-D-histidine cyclohexylammonium salt● In Stock — US Item #: F338611View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- cyclohexanamine;(2R)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-3-[1-[(2-methylpropan-2-yl)oxycarbonyl]imidazol-4-yl]propanoic acid
- SMILES
- CC(C)(C)OC(=O)N1C=C(N=C1)CC(C(=O)O)NC(=O)OCC2C3=CC=CC=C3C4=CC=CC=C24.C1CCC(CC1)N
- InChIKey
- UDEXYAHZNOKVIG-VZYDHVRKSA-N
- InChI
- show more
- Synonyms
- Fmoc-D-His(Boc)-OH×CHA
- LY 78335CAS: 39959-66-5 Formula: C8H9Cl2N.HCl Molecular Weight: 226.53● In Stock — US Item #: L287279View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 1-(2,3-dichlorophenyl)ethanamine;hydrochloride
- SMILES
- CC(C1=C(C(=CC=C1)Cl)Cl)N.Cl
- InChIKey
- FQTXPVLCCDQRHY-UHFFFAOYSA-N
- InChI
- 1S/C8H9Cl2N.ClH/c1-5(11)6-3-2-4-7(9)8(6)10;/h2-5H,11H2,1H3;1H
- Synonyms
- (y)-2,3-Dichloro-alpha-methylbenzylamine hydrochloride | DTXSID80474684 | 1-(2,3-dichlorophenyl)ethanamine;hydrochlor...
- Fmoc-O-allyl-L-m-tyrosineCAS: 1175973-95-1 Formula: C27H25NO5 Molecular Weight: 443.49● In Stock — US Item #: F337125View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (2S)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-3-(3-prop-2-enoxyphenyl)propanoic acid
- SMILES
- C=CCOC1=CC=CC(=C1)CC(C(=O)O)NC(=O)OCC2C3=CC=CC=C3C4=CC=CC=C24
- InChIKey
- JBZULFVSTYZJLP-VWLOTQADSA-N
- InChI
- show more
- Synonyms
- 1175973-95-1 | DTXSID00592359 | (S)-2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-3-(3-(allyloxy)phenyl)propanoicacid...
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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.