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
24,672Navigate 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
102,686Explore 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)
19,733Find 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)
8,799Shop 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
- Fmoc-S-4-methoxytrityl-D-cysteineCAS: 1198791-73-9 Formula: C38H33NO5S Molecular Weight: 615.74◐ .Made to order · 8–12 wks Item #: F337542View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (2S)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-3-[(4-methoxyphenyl)-diphenylmethyl]sulfanylpropanoic acid
- SMILES
- COC1=CC=C(C=C1)C(C2=CC=CC=C2)(C3=CC=CC=C3)SCC(C(=O)O)NC(=O)OCC4C5=CC=CC=C5C6=CC=CC=C46
- InChIKey
- LOBUWFUSGOYXQX-PGUFJCEWSA-N
- InChI
- show more
- Synonyms
- Fmoc-D-Cys(Mmt)-OH | Fmoc-D-Cys(4-methoxytrityl)-OH
- Fmoc-SarcosinolCAS: 147687-15-8 Formula: C18H19NO3 Molecular Weight: 297.35● In Stock — US warehouse, ships to EU* Item #: F337534View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 9H-fluoren-9-ylmethyl N-(2-hydroxyethyl)-N-methylcarbamate
- SMILES
- CN(CCO)C(=O)OCC1C2=CC=CC=C2C3=CC=CC=C13
- InChIKey
- INKRUGORSXCMAT-UHFFFAOYSA-N
- InChI
- 1S/C18H19NO3/c1-19(10-11-20)18(21)22-12-17-15-8-4-2-6-13(15)14-7-3-5-9-16(14)17/h2-9,17,20H,10-12H2,1H3
- Synonyms
- AKOS012614342 | Fmoc-Sar-ol | (9H-fluoren-9-yl)methyl N-(2-hydroxyethyl)-N-methylcarbamate | Carbamic acid, (2-hydrox...
- Fmoc-Tyr(tBu)-Thr(psiMe,Mepro)-OH● In Stock — US warehouse, ships to EU* Item #: F337144View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
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- SMILES
- CC1C(N(C(O1)(C)C)C(=O)C(CC2=CC=C(C=C2)OC(C)(C)C)NC(=O)OCC3C4=CC=CC=C4C5=CC=CC=C35)C(=O)O
- InChIKey
- JYSMURJYNLWZNY-RIGQTMPJSA-N
- InChI
- show more
- Fmoc-α-methyl-D-allylglycineCAS: 288617-76-5 Formula: C21H21NO4 Molecular Weight: 351.4● In Stock — US warehouse, ships to EU* Item #: F337133View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (2R)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-2-methylpent-4-enoic acid
- SMILES
- CC(CC=C)(C(=O)O)NC(=O)OCC1C2=CC=CC=C2C3=CC=CC=C13
- InChIKey
- FNCSRFHDUZYOCR-OAQYLSRUSA-N
- InChI
- 1S/C21H21NO4/c1-3-12-21(2,19(23)24)22-20(25)26-13-18-16-10-6-4-8-14(16)15-9-5-7-11-17(15)18/h3-11,18H,1,12-13H2,2H3,(H,22,25)(H,23,24)/t21-/m1/s1
- Synonyms
- DS-7949 | AM10145 | Fmoc-(R)-2-amino-2-methyl-4-pentenoic acid | (R)-N-Fmoc-2-(2'-propylenyl)alanine | HY-W005913 | F...
- PKI-179, PI3-kinase p110-alpha subunit inhibitor● In Stock — US warehouse, ships to EU* Item #: P345208View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 1-[4-[4-morpholin-4-yl-6-(3-oxa-8-azabicyclo[3.2.1]octan-8-yl)-1,3,5-triazin-2-yl]phenyl]-3-pyridin-4-ylurea
- SMILES
- C1CC2COCC1N2C3=NC(=NC(=N3)N4CCOCC4)C5=CC=C(C=C5)NC(=O)NC6=CC=NC=C6
- InChIKey
- WXUUCRLKXQMWRY-UHFFFAOYSA-N
- InChI
- show more
- Synonyms
- PKI-179 | 1-{4-[4-morpholin-4-yl-6-(3-oxa-8-azabicyclo[3.2.1]oct-8-yl)-1,3,5-triazin-2-yl]phenyl}-3-pyridin-4-ylurea ...
- TrkA InhibitorCAS: 388626-12-8 Formula: C15H13N3O3S Molecular Weight: 315.35● In Stock — US warehouse, ships to EU* Item #: T332338View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 4-[(2-hydroxy-1H-indol-3-yl)methylideneamino]benzenesulfonamide
- SMILES
- C1=CC=C2C(=C1)C(=C(N2)O)C=NC3=CC=C(C=C3)S(=O)(=O)N
- InChIKey
- NCJKZPXFXOMPSP-UHFFFAOYSA-N
- InChI
- 1S/C15H13N3O3S/c16-22(20,21)11-7-5-10(6-8-11)17-9-13-12-3-1-2-4-14(12)18-15(13)19/h1-9,18-19H,(H2,16,20,21)
- Synonyms
- CHEMBL269850 | 4-[(2-hydroxy-1H-indol-3-yl)methylideneamino]benzenesulfonamide | DNDI1417312
- Oridonin● In Stock — US warehouse, ships to EU* Item #: O111382View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (1S,2S,5S,8R,9S,10S,11R,15S,18R)-9,10,15,18-tetrahydroxy-12,12-dimethyl-6-methylidene-17-oxapentacyclo[7.6.2.15,8.01,11.02,8]octadecan-7-one
- SMILES
- CC1(CCC(C23C1C(C(C45C2CCC(C4O)C(=C)C5=O)(OC3)O)O)O)C
- InChIKey
- SDHTXBWLVGWJFT-XKCURVIJSA-N
- InChI
- show more
- Synonyms
- ORIDONIN [INCI] | NSC-250682; Isodonol | Rubescenin | DTXSID201021760 | KAUR-16-EN-15-ONE, 7,20-EPOXY-1,6,7,14-TETRAH...
- Fostamatinib Disodium Hexahydrate, Tyrosine-protein kinase SYK inhibitor● In Stock — US warehouse, ships to EU* Item #: F336802View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- disodium;[6-[[5-fluoro-2-(3,4,5-trimethoxyanilino)pyrimidin-4-yl]amino]-2,2-dimethyl-3-oxopyrido[3,2-b][1,4]oxazin-4-yl]methyl phosphate;hexahydrate
- SMILES
- CC1(C(=O)N(C2=C(O1)C=CC(=N2)NC3=NC(=NC=C3F)NC4=CC(=C(C(=C4)OC)OC)OC)COP(=O)([O-])[O-])C.O.O.O.O.O.O.[Na+].[Na+]
- InChIKey
- ZQGJCHHKJNSPMS-UHFFFAOYSA-L
- InChI
- show more
- Synonyms
- Fostamatinib disodium | Fostamatinib disodium [USAN] | Fostamatinib disodium hexahydrate | R-935788 | Tamatinib fosdi...
- FutalosineCAS: 210644-32-9 Formula: C19H18N4O7 Molecular Weight: 414.37◐ .Made to order · 8–12 wks Item #: F336816View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 3-[3-[(2R,3S,4R,5R)-3,4-dihydroxy-5-(6-oxo-1H-purin-9-yl)oxolan-2-yl]propanoyl]benzoic acid
- SMILES
- C1=CC(=CC(=C1)C(=O)O)C(=O)CCC2C(C(C(O2)N3C=NC4=C3N=CNC4=O)O)O
- InChIKey
- VEDWXCWBMDQNCV-SCFUHWHPSA-N
- InChI
- show more
- Synonyms
- Q27122539 | 3-[3-[(2R,3S,4R,5R)-3,4-dihydroxy-5-(6-oxo-1H-purin-9-yl)oxolan-2-yl]propanoyl]benzoic acid | futalosine ...
- N1-Losartanyl-losartan (Losartan Impurity)● In Stock — US warehouse, ships to EU* Item #: N335749View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- show more
- SMILES
- CCCCC1=NC(=C(N1CC2=CC=C(C=C2)C3=CC=CC=C3C4=NNN=N4)CN5C(=NN=N5)C6=CC=CC=C6C7=CC=C(C=C7)CN8C(=NC(=C8CO)Cl)CCCC)Cl
- InChIKey
- JDOZHSDYJLYMLM-UHFFFAOYSA-N
- InChI
- show more
- Synonyms
- N1-Losartanyl-losartan | N1-Losartanyl-losartan (Losartan Impurity) | [2-Butyl-1-[[2'-[1-[[2-butyl-4-chloro-1-[[2'-(1...
- Udenafil-d7◐ .Made to order · 8–12 wks Item #: U350954View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- show more
- SMILES
- CCCC1=NN(C2=C1N=C(NC2=O)C3=C(C=CC(=C3)S(=O)(=O)NCCC4CCCN4C)OCCC)C
- InChIKey
- IYFNEFQTYQPVOC-SHIXOTCGSA-N
- InChI
- show more
- Synonyms
- DTXSID30858551 | 4-(1,1,2,2,3,3,3-heptadeuteriopropoxy)-3-(1-methyl-7-oxo-3-propyl-6H-pyrazolo[4,3-d]pyrimidin-5-yl)-...
- N6-2-(4-Aminophenyl)ethyladenosineCAS: 89705-21-5 Formula: C18H22N6O4 Molecular Weight: 386.41● In Stock — US warehouse, ships to EU* Item #: N346539View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (2R,3R,4S,5R)-2-[6-[2-(4-aminophenyl)ethylamino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol
- SMILES
- C1=CC(=CC=C1CCNC2=C3C(=NC=N2)N(C=N3)C4C(C(C(O4)CO)O)O)N
- InChIKey
- XTPOZVLRZZIEBW-SCFUHWHPSA-N
- InChI
- show more
- Synonyms
- APNEA | (2R,3R,4S,5R)-2-[6-[2-(4-aminophenyl)ethylamino]purin-9-yl]-5-(hydroxymethyl)oxolane-3,4-diol
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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.