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
102,634Explore 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)
19,701Find 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
- Fluorescent Brightener 220Solid Fluorescence intensity 100%● In Stock — US Item #: F305107View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
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- SMILES
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- InChIKey
- CPZFDTYTCMAAQX-MBCFVHIPSA-J
- InChI
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- Synonyms
- Fluorescent Brightener 220|16470-24-9|C.I. Fluorescent Brightener 220|Leucophor U|Blankophor BBU|Blancofor BBU|25E83C...
- H-Gly-Tyr-Gly-OHCAS: 6099-08-7 Formula: C13H17N3O5 Molecular Weight: 295.3● In Stock — US Item #: H331256View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2-[[(2S)-2-[(2-aminoacetyl)amino]-3-(4-hydroxyphenyl)propanoyl]amino]acetic acid
- SMILES
- C1=CC(=CC=C1CC(C(=O)NCC(=O)O)NC(=O)CN)O
- InChIKey
- HQSKKSLNLSTONK-JTQLQIEISA-N
- InChI
- 1S/C13H17N3O5/c14-6-11(18)16-10(13(21)15-7-12(19)20)5-8-1-3-9(17)4-2-8/h1-4,10,17H,5-7,14H2,(H,15,21)(H,16,18)(H,19,20)/t10-/m0/s1
- 5-Amino-4-chloro-2-methylphenolCAS: 110102-86-8 Formula: C7H8ClNO Molecular Weight: 157.6● In Stock — US Item #: D302187View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 5-amino-4-chloro-2-methylphenol
- SMILES
- CC1=CC(=C(C=C1O)N)Cl
- InChIKey
- WDQMXRWYXILWPT-UHFFFAOYSA-N
- InChI
- 1S/C7H8ClNO/c1-4-2-5(8)6(9)3-7(4)10/h2-3,10H,9H2,1H3
- Synonyms
- 5-Amino-4-chloro-2-methylphenol, AldrichCPR | 3-Amino-4-chloro-6-methylphenol | 5-Amino-4-chloro-o-cresol [INCI] | SY...
- Allopurinol ribosideCAS: 16220-07-8 Formula: C10H12N4O5 Molecular Weight: 268.23Solid ≥95%◐ .Made to order · 8–12 wks Item #: A334307View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 1-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]-5H-pyrazolo[3,4-d]pyrimidin-4-one
- SMILES
- C1=NN(C2=C1C(=O)NC=N2)C3C(C(C(O3)CO)O)O
- InChIKey
- KFQUAMTWOJHPEJ-DAGMQNCNSA-N
- InChI
- 1S/C10H12N4O5/c15-2-5-6(16)7(17)10(19-5)14-8-4(1-13-14)9(18)12-3-11-8/h1,3,5-7,10,15-17H,2H2,(H,11,12,18)/t5-,6-,7-,10-/m1/s1
- Synonyms
- 4-Hydroxy-1H-pyrazolo[3,4-D]pyrimidine riboside | 1-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-y...
- Allopurinol sodiumCAS: 17795-21-0 Formula: C5H3N4NaO Molecular Weight: 159.1● In Stock — US Item #: A274893View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- sodium;1H-pyrazolo[3,4-d]pyrimidin-4-olate
- SMILES
- C1=NNC2=C1C(=NC=N2)[O-].[Na+]
- InChIKey
- PTJRZVJXXNYNLN-UHFFFAOYSA-M
- InChI
- 1S/C5H4N4O.Na/c10-5-3-1-8-9-4(3)6-2-7-5;/h1-2H,(H2,6,7,8,9,10);/q;+1/p-1
- Synonyms
- 1H-Pyrazolo(3,4-d)pyrimidin-4-ol, monosodium salt | AKOS015899245 | 1,5-Dihydro-4H-pyrazolo(3,4-d)pyrimidin-4-one, mo...
- Ac-SAHA◐ .Made to order · 8–12 wks Item #: A276403View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- N-{[7-(Diethylamino)-2-oxo-2H-chromen-4-yl]methoxy}-N'-phenyloctanediamide
- H-gamma-Glu-Abu-OH TFACAS: 16869-42-4(free basis) Formula: C9H16N2O5(free basis) Molecular Weight: 232.23(free basis)● In Stock — US Item #: H353178View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- H-γ-Glu-Abu-Oh TFA | (2S)-2-amino-5-[[(1S)-1-carboxypropyl]amino]-5-oxopentanoic acid TFA | H-Glu(Abu-OH)-OH TFA
- Titanate molecular sieveSolid Pore size: 0.56-0.58 nm, BET: 350-450㎡/g● In Stock — US Item #: T302641View ProductPricing & Pack Sizes
Technical Identifiers
- (S)-2-Amino-4-methylpent-4-enoic acidCAS: 87392-13-0 Formula: C6H11NO2 Molecular Weight: 129.16● In Stock — US Item #: H352892View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (2S)-2-amino-4-methylpent-4-enoic acid
- SMILES
- CC(=C)CC(C(=O)O)N
- InChIKey
- PABWDKROPVYJBH-YFKPBYRVSA-N
- InChI
- 1S/C6H11NO2/c1-4(2)3-5(7)6(8)9/h5H,1,3,7H2,2H3,(H,8,9)/t5-/m0/s1
- Synonyms
- 4,5-DEHYDRO-LEUCINE | H-Leu(4,5-dehydro)-OH | (2S)-2-amino-4-methylpent-4-enoic acid | 4,5-didehydro-l-leucine | (2S)...
- BOC-L-CyclopropylalanineCAS: 89483-06-7 Formula: C11H19NO4 Molecular Weight: 229.27● In Stock — US Item #: B356632View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (2S)-3-cyclopropyl-2-[(2-methylpropan-2-yl)oxycarbonylamino]propanoic acid
- SMILES
- CC(C)(C)OC(=O)NC(CC1CC1)C(=O)O
- InChIKey
- GKRRTFCDSZGFSZ-QMMMGPOBSA-N
- InChI
- 1S/C11H19NO4/c1-11(2,3)16-10(15)12-8(9(13)14)6-7-4-5-7/h7-8H,4-6H2,1-3H3,(H,12,15)(H,13,14)/t8-/m0/s1
- Synonyms
- (S)-2-((tert-Butoxycarbonyl)amino)-3-cyclopropylpropanoic acid | BOC-L-Cyclopropylalanine | (S)-2-(BOC-Amino)-3-cyclo...
- Boc-D-Asn(Xan)-OHCAS: 200192-48-9 Formula: C22H24N2O6 Molecular Weight: 412.44● In Stock — US Item #: B356231View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (2R)-2-[(2-methylpropan-2-yl)oxycarbonylamino]-4-oxo-4-(9H-xanthen-9-ylamino)butanoic acid
- SMILES
- CC(C)(C)OC(=O)NC(CC(=O)NC1C2=CC=CC=C2OC3=CC=CC=C13)C(=O)O
- InChIKey
- YMGDQLXBNMRJMR-OAHLLOKOSA-N
- InChI
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- H-Ser-Ala-OHCAS: 6403-17-4 Formula: C6H12N2O4 Molecular Weight: 176.17◐ .Made to order · 8–12 wks Item #: H353191View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (2S)-2-[[(2S)-2-amino-3-hydroxypropanoyl]amino]propanoic acid
- SMILES
- CC(C(=O)O)NC(=O)C(CO)N
- InChIKey
- SSJMZMUVNKEENT-IMJSIDKUSA-N
- InChI
- 1S/C6H12N2O4/c1-3(6(11)12)8-5(10)4(7)2-9/h3-4,9H,2,7H2,1H3,(H,8,10)(H,11,12)/t3-,4-/m0/s1
- Synonyms
- serylalanine | (S)-2-((S)-2-Amino-3-hydroxyPropanamido)Propanoic acid | L-seryl-L-alanine | Ser-Ala-OH
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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.