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).
Targets & Pathways
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
24,635Navigate 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
102,621Explore 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)
19,694Find 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 —to build screening and validation sets.
By Disease (DOID)
8,779Shop 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.
Products
- PasiniazidCAS: 2066-89-9 EC Number: 218-183-2 PubChem CID: 16367 Formula: C6H7N3O · C7H7NO3 Molecular Weight: 290.2710mM in DMSO● In Stock — US warehouse, ships to EU* Item #: P422509View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 4-amino-2-hydroxybenzoic acid;pyridine-4-carbohydrazide
- SMILES
- C1=CC(=C(C=C1N)O)C(=O)O.C1=CN=CC=C1C(=O)NN
- InChIKey
- RKPHTRVPGYGVQD-UHFFFAOYSA-N
- InChI
- 1S/C7H7NO3.C6H7N3O/c8-4-1-2-5(7(10)11)6(9)3-4;7-9-6(10)5-1-3-8-4-2-5/h1-3,9H,8H2,(H,10,11);1-4H,7H2,(H,9,10)
- Synonyms
- UNII-83J17CN0MN | PASINIAZID [INN] | IDI1_000327 | NCGC00024460-02 | Pharmakon1600-01503381 | AKOS026749897 | NCGC000...
- Pasiniazid● In Stock — US warehouse, ships to EU* Item #: P337788View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 4-amino-2-hydroxybenzoic acid;pyridine-4-carbohydrazide
- SMILES
- C1=CC(=C(C=C1N)O)C(=O)O.C1=CN=CC=C1C(=O)NN
- InChIKey
- RKPHTRVPGYGVQD-UHFFFAOYSA-N
- InChI
- 1S/C7H7NO3.C6H7N3O/c8-4-1-2-5(7(10)11)6(9)3-4;7-9-6(10)5-1-3-8-4-2-5/h1-3,9H,8H2,(H,10,11);1-4H,7H2,(H,9,10)
- Synonyms
- UNII-83J17CN0MN | PASINIAZID [INN] | IDI1_000327 | NCGC00024460-02 | Pharmakon1600-01503381 | AKOS026749897 | NCGC000...
- Pectolinarigenin● In Stock — US warehouse, ships to EU* Item #: P412870View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 5,7-dihydroxy-6-methoxy-2-(4-methoxyphenyl)chromen-4-one
- SMILES
- COC1=CC=C(C=C1)C2=CC(=O)C3=C(O2)C=C(C(=C3O)OC)O
- InChIKey
- GPQLHGCIAUEJQK-UHFFFAOYSA-N
- InChI
- 1S/C17H14O6/c1-21-10-5-3-9(4-6-10)13-7-11(18)15-14(23-13)8-12(19)17(22-2)16(15)20/h3-8,19-20H,1-2H3
- Synonyms
- 4U3UZ1K35N | ACon1_001597 | C17784 | 1-.beta.-D-Ribofuranosyl-2,4(1H,3H)-pyrimidinedione | LMPK12111164 | ST077090 | ...
- Parathion-methyl solutionLiquid Analytical standard ? Analytical standard — certified-purity material for quantitative calibration. Use to prepare calibration standards and validate analytical methods. 10ug/ml in acetone● In Stock — US warehouse, ships to EU* Item #: P109835View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- Methyl parathion O,O-Dimethyl O-(4-nitrophenyl) phosphorothioate
- ParbendazoleCAS: 14255-87-9 EC Number: 238-133-3 PubChem CID: 26596 Formula: C13H17N3O2 Molecular Weight: 247.29Liquid 10mM in DMSO● In Stock — US warehouse, ships to EU* Item #: P421573View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- methyl N-(6-butyl-1H-benzimidazol-2-yl)carbamate
- SMILES
- CCCCC1=CC2=C(C=C1)N=C(N2)NC(=O)OC
- InChIKey
- YRWLZFXJFBZBEY-UHFFFAOYSA-N
- InChI
- 1S/C13H17N3O2/c1-3-4-5-9-6-7-10-11(8-9)15-12(14-10)16-13(17)18-2/h6-8H,3-5H2,1-2H3,(H2,14,15,16,17)
- Synonyms
- 5-Butyl-2-(carbomethoxyamino)benzimidazole | BRD-K02407574-001-04-8 | DTXCID8025410 | SKF-29044 | HMS1571M22 | NSC256...
- PectolinarigeninEnzymoPure™ ? EnzymoPure™ — Aladdin's line of high-quality enzymatic solutions. Use when enzyme purity and defined activity drive assay or process performance. 10mM in DMSO● In Stock — US warehouse, ships to EU* Item #: P424457View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 5,7-dihydroxy-6-methoxy-2-(4-methoxyphenyl)chromen-4-one
- SMILES
- COC1=CC=C(C=C1)C2=CC(=O)C3=C(O2)C=C(C(=C3O)OC)O
- InChIKey
- GPQLHGCIAUEJQK-UHFFFAOYSA-N
- InChI
- 1S/C17H14O6/c1-21-10-5-3-9(4-6-10)13-7-11(18)15-14(23-13)8-12(19)17(22-2)16(15)20/h3-8,19-20H,1-2H3
- Synonyms
- 4U3UZ1K35N | ACon1_001597 | C17784 | 1-.beta.-D-Ribofuranosyl-2,4(1H,3H)-pyrimidinedione | LMPK12111164 | ST077090 | ...
- Pefloxacin Mesylate10mM in DMSO● In Stock — US warehouse, ships to EU* Item #: P408484View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- 1-ethyl-6-fluoro-7-(4-methylpiperazin-1-yl)-4-oxo-1,4-dihydroquinoline-3-carboxylic acid mesylate
- Pefloxacin Mesylate Dihydrate10mM in DMSO● In Stock — US warehouse, ships to EU* Item #: P408117View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- 1589 RB | 3-Quinolinecarboxylic acid, 1-ethyl-6-fluoro-1,4-dihydro-7-(4-methyl-1-piperazinyl)-4-oxo-, methanesulfonat...
- Pemetrexed, GAR transformylase inhibitor10mM in Water● In Stock — US warehouse, ships to EU* Item #: P421773View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- disodium;(2S)-2-[[4-[2-(2-amino-4-oxo-3,7-dihydropyrrolo[2,3-d]pyrimidin-5-yl)ethyl]benzoyl]amino]pentanedioate
- SMILES
- C1=CC(=CC=C1CCC2=CNC3=C2C(=O)NC(=N3)N)C(=O)NC(CCC(=O)[O-])C(=O)[O-].[Na+].[Na+]
- InChIKey
- NYDXNILOWQXUOF-GXKRWWSZSA-L
- InChI
- show more
- Synonyms
- CAS-150399-23-8 | Pemetrexed Disodium is known as a Thymidylate synthase inhibitor. | PEMETREXED DISODIUM [USP MONOGR...
- Pemrametostat (GSK3326595), Protein arginine N-methyltransferase 5 inhibitorCAS: 1616392-22-3 Formula: C24H32N6O3 Molecular Weight: 452.55● In Stock — US warehouse, ships to EU* Item #: P414102View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 6-[(1-acetylpiperidin-4-yl)amino]-N-[(2S)-3-(3,4-dihydro-1H-isoquinolin-2-yl)-2-hydroxypropyl]pyrimidine-4-carboxamide
- SMILES
- CC(=O)N1CCC(CC1)NC2=NC=NC(=C2)C(=O)NCC(CN3CCC4=CC=CC=C4C3)O
- InChIKey
- JLCCNYVTIWRPIZ-NRFANRHFSA-N
- InChI
- show more
- Synonyms
- 4-pyrimidinecarboxamide, 6-((1-acetyl-4-piperidinyl)amino)-N-(3-(3,4-dihydro-2(1H)-isoquinolinyl)-2-hydroxypropyl)- |...
- Pemirolast potassium10mM in Water● In Stock — US warehouse, ships to EU* Item #: P420260View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- potassium;9-methyl-3-(1,2,3-triaza-4-azanidacyclopenta-2,5-dien-5-yl)pyrido[1,2-a]pyrimidin-4-one
- SMILES
- CC1=CC=CN2C1=NC=C(C2=O)C3=NN=N[N-]3.[K+]
- InChIKey
- NMMVKSMGBDRONO-UHFFFAOYSA-N
- InChI
- 1S/C10H7N6O.K/c1-6-3-2-4-16-9(6)11-5-7(10(16)17)8-12-14-15-13-8;/h2-5H,1H3;/q-1;+1
- Synonyms
- PEMIROLAST POTASSIUM|100299-08-9|Pemilaston|Alamast|Pemirolast potassium salt|Alegysal|BMY 26517|BMY-26517|CCRIS 3562...
- Pemrametostat (GSK3326595), Protein arginine N-methyltransferase 5 inhibitorCAS: 1616392-22-3 Formula: C24H32N6O3 Molecular Weight: 452.5510mM in DMSO● In Stock — US warehouse, ships to EU* Item #: P408209View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- EPZ015938 | 4-Pyrimidinecarboxamide, 6-[(1-acetyl-4-piperidinyl)amino]-N-[(2S)-3-(3,4-dihydro-2(1H)-�...
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.