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
Browse by type, application, or key specifications such as purity, grade, packaging, and handling requirements.
136,976 products
Shop by category
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
24,643Navigate 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
102,641Explore 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)
19,704Find 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)
8,783Shop 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
- DPDPE TFACAS: 172888-59-4 Formula: C30H39N5O7S2(free) Molecular Weight: 645.79(free)● In Stock — US warehouse, ships to EU* Item #: D275690View ProductPricing & Pack Sizes
Technical Identifiers
- Sodium silicateAR ? Analytical Reagent grade — high-purity chemicals meeting strict assay limits for lab analysis. Use when accuracy matters and trace impurities could skew results. Molar ratio:2.80-3.00● In Stock — US warehouse, ships to EU* Item #: S302433View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- Sodium silicate
- 7-Bromo-6-methyl-2-phenylquinoline-4-ol● In Stock — US warehouse, ships to EU* Item #: B335204View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 7-bromo-6-methyl-2-phenyl-1H-quinolin-4-one
- SMILES
- CC1=CC2=C(C=C1Br)NC(=CC2=O)C3=CC=CC=C3
- InChIKey
- WOPFISLEZFHZFG-UHFFFAOYSA-N
- InChI
- 1S/C16H12BrNO/c1-10-7-12-15(8-13(10)17)18-14(9-16(12)19)11-5-3-2-4-6-11/h2-9H,1H3,(H,18,19)
- Synonyms
- MFCD12675099 | AKOS025394200 | 7-Bromo-6-methyl-2-phenylquinoline-4-ol | 1189105-49-4 | 7-Bromo-4-hydroxy-6-methyl-2-...
- NSC 295642CAS: 77111-29-6 Formula: C15H14ClCuN3S2 Molecular Weight: 399.42◐ .Made to order · 8–12 wks Item #: N352361View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (E)-benzylsulfanyl-[(E)-1-pyridin-2-ylethylidenehydrazinylidene]-sulfidomethane;chlorocopper(1+)
- SMILES
- CC(=NN=C([S-])SCC1=CC=CC=C1)C2=CC=CC=N2.Cl[Cu+]
- InChIKey
- MGXCRQNCPJBYKM-CWQUOYFRSA-L
- InChI
- 1S/C15H15N3S2.ClH.Cu/c1-12(14-9-5-6-10-16-14)17-18-15(19)20-11-13-7-3-2-4-8-13;;/h2-10H,11H2,1H3,(H,18,19);1H;/q;;+2/p-2/b17-12+;;
- Synonyms
- (E)-benzylsulfanyl-[(E)-1-pyridin-2-ylethylidenehydrazinylidene]-sulfidomethane;chlorocopper(1+) | DTXSID20444568 | N...
- DPQSolid 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 #: D275293View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 5-(4-piperidin-1-ylbutoxy)-3,4-dihydro-2H-isoquinolin-1-one
- SMILES
- C1CCN(CC1)CCCCOC2=CC=CC3=C2CCNC3=O
- InChIKey
- RVOUDNBEIXGHJY-UHFFFAOYSA-N
- InChI
- 1S/C18H26N2O2/c21-18-16-7-6-8-17(15(16)9-10-19-18)22-14-5-4-13-20-11-2-1-3-12-20/h6-8H,1-5,9-14H2,(H,19,21)
- Synonyms
- 32Z | 5-[4-(1-Piperidinyl)-butyloxy]-1,2,3,4-tetrahydroisoquinolin-1-one | EX-A8022 | HY-114869 | AC-10288 | 5-(4-(Pi...
- DR 4485 hydrochloride◐ .Made to order · 8–12 wks Item #: D287026View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 6-chloro-2a-[4-[4-(4-chlorophenyl)-3,6-dihydro-2H-pyridin-1-yl]butyl]-1,3,4,5-tetrahydrobenzo[cd]indol-2-one;hydrochloride
- SMILES
- C1CC2=C(C=CC3=C2C(C1)(C(=O)N3)CCCCN4CCC(=CC4)C5=CC=C(C=C5)Cl)Cl.Cl
- InChIKey
- QAERYGXKDZHTFR-UHFFFAOYSA-N
- InChI
- show more
- Synonyms
- 6-chloro-2a-[4-[4-(4-chlorophenyl)-3,6-dihydro-2H-pyridin-1-yl]butyl]-1,3,4,5-tetrahydrobenzo[cd]indol-2-one;hydrochl...
- Polymyxin B1● In Stock — US warehouse, ships to EU* Item #: P343277View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- show more
- SMILES
- CCC(C)CCCCC(=O)NC(CCN)C(=O)NC(C(C)O)C(=O)NC(CCN)C(=O)NC1CCNC(=O)C(NC(=O)C(NC(=O)C(NC(=O)C(NC(=O)C(NC(=O)C(NC1=O)CCN)CC2=CC=CC=C2)CC(C)C)CCN)CCN)C(C)O
- InChIKey
- WQVJHHACXVLGBL-CTMZAJDNSA-N
- InChI
- show more
- Synonyms
- (S)-N-((S)-4-amino-1-(((2S,3R)-1-(((S)-4-amino-1-oxo-1-(((3S,6S,9S,12S,15R,18S,21S)-6,9,18-tris(2-aminoethyl)-15-benz...
- DREADD Agonist 21CAS: 56296-18-5 Formula: C17H18N4 Molecular Weight: 278.35Solid ≥98%● In Stock — US warehouse, ships to EU* Item #: D276441View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 6-piperazin-1-yl-11H-benzo[b][1,4]benzodiazepine
- SMILES
- C1CN(CCN1)C2=NC3=CC=CC=C3NC4=CC=CC=C42
- InChIKey
- JCBYXNSOLUVGTF-UHFFFAOYSA-N
- InChI
- 1S/C17H18N4/c1-2-6-14-13(5-1)17(21-11-9-18-10-12-21)20-16-8-4-3-7-15(16)19-14/h1-8,18-19H,9-12H2
- Synonyms
- 11-(1-piperazinyl)-5H-Dibenzo[b,e][1,4]diazepine | 11-(Piperazin-1-yl)-5H-dibenzo[b,e][1,4]diazepine | 11-Piperazinyl...
- DL-Penicillamine● In Stock — US warehouse, ships to EU* Item #: P113830View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2-amino-3-methyl-3-sulfanylbutanoic acid
- SMILES
- CC(C)(C(C(=O)O)N)S
- InChIKey
- VVNCNSJFMMFHPL-UHFFFAOYSA-N
- InChI
- 1S/C5H11NO2S/c1-5(2,9)3(6)4(7)8/h3,9H,6H2,1-2H3,(H,7,8)
- Synonyms
- 3,3-Dimethyl-DL-cysteine | 3-Mercapto-DL-valine | (+-)-Penicillamine | CCG-40247 | CHEBI:50868 | 2-amino-3-methyl-3-s...
- DL-Phenylalanine benzyl ester 4-toluenesulfonate saltCAS: 119290-61-8 Formula: C16H17NO2·C7H8O3S Molecular Weight: 427.5● In Stock — US warehouse, ships to EU* Item #: D351572View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- benzyl 2-amino-3-phenylpropanoate;4-methylbenzenesulfonic acid
- SMILES
- CC1=CC=C(C=C1)S(=O)(=O)O.C1=CC=C(C=C1)CC(C(=O)OCC2=CC=CC=C2)N
- InChIKey
- ZLZGBBIPWXUQST-UHFFFAOYSA-N
- InChI
- 1S/C16H17NO2.C7H8O3S/c17-15(11-13-7-3-1-4-8-13)16(18)19-12-14-9-5-2-6-10-14;1-6-2-4-7(5-3-6)11(8,9)10/h1-10,15H,11-12,17H2;2-5H,1H3,(H,8,9,10)
- Synonyms
- DL-Phenylalanine benZyl ester 4-toluenesulfonate salt (H-DL-Phe-OBZl.TsOH) | FT-0625603 | AKOS015908895 | L-Phenylala...
- DL-Phenylalanine t-butyl ester hydrochlorideCAS: 75898-47-4 Formula: C13H19NO2·HCl Molecular Weight: 257.8Solid ≥97%● In Stock — US warehouse, ships to EU* Item #: D351599View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- tert-butyl 2-amino-3-phenylpropanoate;hydrochloride
- SMILES
- CC(C)(C)OC(=O)C(CC1=CC=CC=C1)N.Cl
- InChIKey
- FDMCEXDXULPJPG-UHFFFAOYSA-N
- InChI
- 1S/C13H19NO2.ClH/c1-13(2,3)16-12(15)11(14)9-10-7-5-4-6-8-10;/h4-8,11H,9,14H2,1-3H3;1H
- Synonyms
- A875120 | tert-Butyl 3-phenyl-L-alaninate hydrochloride | EN300-295902 | EINECS 239-151-4 | FT-0625605 | A809106 | te...
- DL-Pipecolic acid hydrochlorideCAS: 5107-10-8 Formula: C6H12ClNO2 Molecular Weight: 165.62● In Stock — US warehouse, ships to EU* Item #: D331240View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- piperidine-2-carboxylic acid;hydrochloride
- SMILES
- C1CCNC(C1)C(=O)O.Cl
- InChIKey
- AUGDEGXARBUSFU-UHFFFAOYSA-N
- InChI
- 1S/C6H11NO2.ClH/c8-6(9)5-3-1-2-4-7-5;/h5,7H,1-4H2,(H,8,9);1H
- Synonyms
- A-Phorbol 12,13-didecanoate | DL-Pipecolic acid HCl (H-DL-Pip-OH.HCl) | DL-Pipecolinic acid hydrochloride | L-Pipecol...
Fast Shipping Same-day shipping on in-stock items
Technical Details Quality & specification info on every product page
Pack Size Options Multiple packaging sizes with pricing access from listing
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.