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
24,642Navigate 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
- AZ 10397767◐ .Made to order · 8–12 wks Item #: A287373View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 5-[(3-chloro-2-fluorophenyl)methylsulfanyl]-7-[[(2R)-1-hydroxypropan-2-yl]amino]-3H-[1,3]thiazolo[4,5-d]pyrimidin-2-one
- SMILES
- CC(CO)NC1=NC(=NC2=C1SC(=O)N2)SCC3=C(C(=CC=C3)Cl)F
- InChIKey
- KHTUORKUWBDRBX-SSDOTTSWSA-N
- InChI
- 1S/C15H14ClFN4O2S2/c1-7(5-22)18-12-11-13(21-15(23)25-11)20-14(19-12)24-6-8-3-2-4-9(16)10(8)17/h2-4,7,22H,5-6H2,1H3,(H2,18,19,20,21,23)/t7-/m1/s1
- Synonyms
- 5-[[(3-Chloro-2-fluorophenyl)methyl]thio]-7-[[(1R)-2-hydroxy-1-methylethyl]amino]thiazolo[4,5-d]pyrimidin-2(3H)-one
- AZ 10606120 dihydrochloride● In Stock — US Item #: A288095View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2-(1-adamantyl)-N-[2-[2-(2-hydroxyethylamino)ethylamino]quinolin-5-yl]acetamide;dihydrochloride
- SMILES
- C1C2CC3CC1CC(C2)(C3)CC(=O)NC4=CC=CC5=C4C=CC(=N5)NCCNCCO.Cl.Cl
- InChIKey
- BVFONFUUWORSPO-UHFFFAOYSA-N
- InChI
- show more
- Synonyms
- N-[2-[[2-[(2-Hydroxyethyl)amino]ethyl]amino]-5-quinolinyl]-2-tricyclo[3.3.1.13,7]dec-1-ylacetamide dihydrochloride
- DiflunisalSolid ≥98%● In Stock — US Item #: D133115View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 5-(2,4-difluorophenyl)-2-hydroxybenzoic acid
- SMILES
- C1=CC(=C(C=C1C2=C(C=C(C=C2)F)F)C(=O)O)O
- InChIKey
- HUPFGZXOMWLGNK-UHFFFAOYSA-N
- InChI
- 1S/C13H8F2O3/c14-8-2-3-9(11(15)6-8)7-1-4-12(16)10(5-7)13(17)18/h1-6,16H,(H,17,18)
- Synonyms
- DIFLUNISAL [EP IMPURITY] | DIFLUNISAL [JAN] | KBio3_001423 | Prestwick0_000039 | DIFLUNISAL [USAN] | SCHEMBL4337 | Un...
- AT13387, Heat shock protein HSP90 inhibitorCAS: 912999-49-6 Formula: C24H31N3O3 Molecular Weight: 409.52● In Stock — US Item #: A127900View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (2,4-dihydroxy-5-propan-2-ylphenyl)-[5-[(4-methylpiperazin-1-yl)methyl]-1,3-dihydroisoindol-2-yl]methanone
- SMILES
- CC(C)C1=CC(=C(C=C1O)O)C(=O)N2CC3=C(C2)C=C(C=C3)CN4CCN(CC4)C
- InChIKey
- IFRGXKKQHBVPCQ-UHFFFAOYSA-N
- InChI
- 1S/C24H31N3O3/c1-16(2)20-11-21(23(29)12-22(20)28)24(30)27-14-18-5-4-17(10-19(18)15-27)13-26-8-6-25(3)7-9-26/h4-5,10-12,16,28-29H,6-9,13-15H2,1-3H3
- Synonyms
- Onalespib | 912999-49-6 (free base) | Q7Y33N57ZZ | Onalespib (AT13387) | (2,4-Dihydroxy-5-isopropylphenyl)(5-((4-meth...
- ATC0065 dihydrochloride● In Stock — US Item #: A332126View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2-N-[4-[2-[4-bromo-2-(trifluoromethoxy)phenyl]ethylamino]cyclohexyl]-4-N,4-N-dimethylquinazoline-2,4-diamine;dihydrochloride
- SMILES
- CN(C)C1=NC(=NC2=CC=CC=C21)NC3CCC(CC3)NCCC4=C(C=C(C=C4)Br)OC(F)(F)F.Cl.Cl
- InChIKey
- BPGUWYBAINNZQH-UHFFFAOYSA-N
- InChI
- show more
- Synonyms
- UNII-3Q2C0BZD71 | N2-[cis-4-[[2-[4-Bromo-2-(trifluoromethoxy)phenyl]ethyl]amino]cyclohexyl]-N4,N4-dimethyl-2,4-quinaz...
- MPC 6827 hydrochlorideCAS: 917369-31-4 Formula: C17H17N3O•HCl Molecular Weight: 315.8◐ .Made to order · 8–12 wks Item #: M287518View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- N-(4-methoxyphenyl)-N,2-dimethylquinazolin-4-amine;hydrochloride
- SMILES
- CC1=NC2=CC=CC=C2C(=N1)N(C)C3=CC=C(C=C3)OC.Cl
- InChIKey
- VYUWDIKZJLOZJL-UHFFFAOYSA-N
- InChI
- 1S/C17H17N3O.ClH/c1-12-18-16-7-5-4-6-15(16)17(19-12)20(2)13-8-10-14(21-3)11-9-13;/h4-11H,1-3H3;1H
- Synonyms
- Verubulin hydrochloride | Verubulin hydrochloride [USAN] | MPC-6827 hydrochlorideMPC-6827 hydrochloride | N-(4-Methox...
- Thieno[2,3-b]pyridine-2-carboxylic acidCAS: 59944-76-2 Formula: C8H5NO2S Molecular Weight: 179.2◐ .Made to order · 8–12 wks Item #: T347340View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- thieno[2,3-b]pyridine-2-carboxylic acid
- SMILES
- C1=CC2=C(N=C1)SC(=C2)C(=O)O
- InChIKey
- XGCSHAYMNOFFNA-UHFFFAOYSA-N
- InChI
- 1S/C8H5NO2S/c10-8(11)6-4-5-2-1-3-9-7(5)12-6/h1-4H,(H,10,11)
- Synonyms
- AKOS000732794 | SCHEMBL844336 | J-524926 | XGCSHAYMNOFFNA-UHFFFAOYSA-N | CHEBI:195134 | A852969 | Z1201624090 | SY101...
- Alkannin◐ .Made to order · 8–12 wks Item #: S303868View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 5,8-dihydroxy-2-[(1S)-1-hydroxy-4-methylpent-3-enyl]naphthalene-1,4-dione
- SMILES
- CC(=CCC(C1=CC(=O)C2=C(C=CC(=C2C1=O)O)O)O)C
- InChIKey
- NEZONWMXZKDMKF-JTQLQIEISA-N
- InChI
- 1S/C16H16O5/c1-8(2)3-4-10(17)9-7-13(20)14-11(18)5-6-12(19)15(14)16(9)21/h3,5-7,10,17-19H,4H2,1-2H3/t10-/m0/s1
- Synonyms
- Alkannin|517-88-4|Alkanna Red|Anchusin|Anchusa acid|Alkannin (VAN)|Anchusin (VAN)|shikonin|Alkanna red (VAN)|Anchusa ...
- ATI-2341 TFACAS: 1337878-62-2(free) Formula: C106H179F3N26O27S2 Molecular Weight: 2370.84● In Stock — US Item #: A295037View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- (2S,3Z,5S,6Z,8S,9Z,11S,12Z,14S)-11-(4-aminobutyl)-14-((Z)-((2S,3Z,5S,6Z,8S,9Z,11S,12Z,14S,15Z,17S,18Z,20S,21Z,23S,24Z...
- Benzo[b]thiophene 1,1-dioxide● In Stock — US Item #: T304728View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 1-benzothiophene 1,1-dioxide
- SMILES
- C1=CC=C2C(=C1)C=CS2(=O)=O
- InChIKey
- FRJNKYGTHPUSJR-UHFFFAOYSA-N
- InChI
- 1S/C8H6O2S/c9-11(10)6-5-7-3-1-2-4-8(7)11/h1-6H
- Synonyms
- Benzo[b]thiophene 1,1-dioxide | CHEBI:194821 | Z425439028 | Benzothiophene 1,1-dioxide | Thianaphthene 1,1-dioxide | ...
- DL-AP7CAS: 85797-13-3 Formula: C7H16NO5P Molecular Weight: 225.18◐ .Made to order · 8–12 wks Item #: D286962View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2-amino-7-phosphonoheptanoic acid
- SMILES
- C(CCC(C(=O)O)N)CCP(=O)(O)O
- InChIKey
- MYDMWESTDPJANS-UHFFFAOYSA-N
- InChI
- 1S/C7H16NO5P/c8-6(7(9)10)4-2-1-3-5-14(11,12)13/h6H,1-5,8H2,(H,9,10)(H2,11,12,13)
- Synonyms
- D-200 | Tox21_500008 | (+/-)-2-Amino-7-phosphonoheptanoic acid | AKOS005066193 | MYDMWESTDPJANS-UHFFFAOYSA-N | PDSP2_...
- Dimethyl 4-NitroisophthalateCAS: 69048-70-0 Formula: C10H9NO6 Molecular Weight: 239.18● In Stock — US Item #: D304403View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- dimethyl 4-nitrobenzene-1,3-dicarboxylate
- SMILES
- COC(=O)C1=CC(=C(C=C1)[N+](=O)[O-])C(=O)OC
- InChIKey
- IFGRLSNABSJUIU-UHFFFAOYSA-N
- InChI
- 1S/C10H9NO6/c1-16-9(12)6-3-4-8(11(14)15)7(5-6)10(13)17-2/h3-5H,1-2H3
![Thieno[2,3-b]pyridine-2-carboxylic acid - , used for , CAS No. 59944-76-2, by Aladdin Scientific](https://www.aladdinsci.com/media/catalog/product/cache/6360e336b2a70951114dbd37294096ee/T/3/T347340.png)
![Benzo[b]thiophene 1,1-dioxide - 97%, used for , CAS No. 825-44-5, by Aladdin Scientific](https://www.aladdinsci.com/media/catalog/product/cache/6360e336b2a70951114dbd37294096ee/T/3/T304728.png)
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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.