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
- Pyrantel pamoateLiquid 10mM in DMSO● In Stock — US warehouse, ships to EU* Item #: P422658View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- show more
- SMILES
- CN1CCCN=C1C=CC2=CC=CS2.C1=CC=C2C(=C1)C=C(C(=C2CC3=C(C(=CC4=CC=CC=C43)C(=O)O)O)O)C(=O)O
- InChIKey
- AQXXZDYPVDOQEE-MXDQRGINSA-N
- InChI
- show more
- Synonyms
- PIRANTEL PAMOATE | Pyirantelpamoate | Pyranteli embonas | Vermocks | Banminth-P Paste, Strongid Paste | 81BK194Z5M | ...
- PyrazinamideLiquid Moligand™ ? Moligand™ — Aladdin's line of ligands and bioactive small molecules. Use for receptor, pathway, and binding studies needing defined small-molecule tools. 10mM in DMSO● In Stock — US warehouse, ships to EU* Item #: P408463View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- Pyrazinoic Acid Amide | 2-Pyrazinecarboxamide
- Puromycin (CL13900) 2HClLiquid 10mM in DMSO● In Stock — US warehouse, ships to EU* Item #: P408017View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- 3'-[[(2S)-2-amino-3-(4-methoxyphenyl)-1-oxopropyl]amino]-3'-deoxy-N,N-dimethyl-adenosine,hydrochloride (1:2)
- Pyrene 1-sulfonyl chloride◐ .Made to order · 8–12 wks Item #: P276433View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- pyrene-1-sulfonyl chloride
- SMILES
- C1=CC2=C3C(=C1)C=CC4=C(C=CC(=C43)C=C2)S(=O)(=O)Cl
- InChIKey
- YTFLOMYZTLUWHX-UHFFFAOYSA-N
- InChI
- 1S/C16H9ClO2S/c17-20(18,19)14-9-7-12-5-4-10-2-1-3-11-6-8-13(14)16(12)15(10)11/h1-9H
- Synonyms
- 1-Pyrenesulfonylchloride
- Pyrilamine Maleate Salt, Histamine H1 receptor antagonistCAS: 59-33-6 EC Number: 200-422-7 PubChem CID: 5284451 Formula: C17H23N3O · C4H4O4 Molecular Weight: 401.4610mM in DMSO● In Stock — US warehouse, ships to EU* Item #: P424946View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (Z)-but-2-enedioic acid;N'-[(4-methoxyphenyl)methyl]-N,N-dimethyl-N'-pyridin-2-ylethane-1,2-diamine
- SMILES
- CN(C)CCN(CC1=CC=C(C=C1)OC)C2=CC=CC=N2.C(=CC(=O)O)C(=O)O
- InChIKey
- JXYWFNAQESKDNC-BTJKTKAUSA-N
- InChI
- 1S/C17H23N3O.C4H4O4/c1-19(2)12-13-20(17-6-4-5-11-18-17)14-15-7-9-16(21-3)10-8-15;5-3(6)1-2-4(7)8/h4-11H,12-14H2,1-3H3;1-2H,(H,5,6)(H,7,8)/b;2-1-
- Synonyms
- PYRILAMINE MALEATE|Mepyramine maleate|59-33-6|Histatex|Histan|Anisopyradamine|Histosol|Minihist|Pymafed|Pyrilamine ma...
- Pyridine-2-carboxaldehyde 2-quinolylhydrazoneSolid ≥97%● In Stock — US warehouse, ships to EU* Item #: P344735View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- N-[(E)-pyridin-2-ylmethylideneamino]quinolin-2-amine
- SMILES
- C1=CC=C2C(=C1)C=CC(=N2)NN=CC3=CC=CC=N3
- InChIKey
- RQKUHYQNHJJIFO-GZTJUZNOSA-N
- InChI
- 1S/C15H12N4/c1-2-7-14-12(5-1)8-9-15(18-14)19-17-11-13-6-3-4-10-16-13/h1-11H,(H,18,19)/b17-11+
- Synonyms
- 2-Pyridinecarboxaldehyde, 2-quinolinylhydrazone | Picolinaldehyde, 2-quinolylhydrazone | Pyridine-2-aldehyde-2-quinol...
- Pyridostatin (RR82) Trifluoroacetate Salt10mM in DMSO● In Stock — US warehouse, ships to EU* Item #: P421715View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 4-(2-aminoethoxy)-2-N,6-N-bis[4-(2-aminoethoxy)quinolin-2-yl]pyridine-2,6-dicarboxamide;2,2,2-trifluoroacetic acid
- SMILES
- C1=CC=C2C(=C1)C(=CC(=N2)NC(=O)C3=CC(=CC(=N3)C(=O)NC4=NC5=CC=CC=C5C(=C4)OCCN)OCCN)OCCN.C(=O)(C(F)(F)F)O
- InChIKey
- SLFYRKZWSPFGQZ-UHFFFAOYSA-N
- InChI
- show more
- Synonyms
- 4-(2-Aminoethoxy)-N2,N6-bis[4-(2-aminoethoxy)-2-quinolinyl]-2,6-pyridinedicarboxamide trifluoroacetate salt
- Pyridostatin (RR82) Trifluoroacetate Salt● In Stock — US warehouse, ships to EU* Item #: P413753View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 4-(2-aminoethoxy)-2-N,6-N-bis[4-(2-aminoethoxy)quinolin-2-yl]pyridine-2,6-dicarboxamide;2,2,2-trifluoroacetic acid
- SMILES
- C1=CC=C2C(=C1)C(=CC(=N2)NC(=O)C3=CC(=CC(=N3)C(=O)NC4=NC5=CC=CC=C5C(=C4)OCCN)OCCN)OCCN.C(=O)(C(F)(F)F)O
- InChIKey
- SLFYRKZWSPFGQZ-UHFFFAOYSA-N
- InChI
- show more
- Synonyms
- 4-(2-Aminoethoxy)-N2,N6-bis[4-(2-aminoethoxy)-2-quinolinyl]-2,6-pyridinedicarboxamide trifluoroacetate salt
- Pyridostatin pentahydrochloride◐ .Made to order · 8–12 wks Item #: P287345View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 4-(2-aminoethoxy)-2-N,6-N-bis[4-(2-aminoethoxy)quinolin-2-yl]pyridine-2,6-dicarboxamide;pentahydrochloride
- SMILES
- C1=CC=C2C(=C1)C(=CC(=N2)NC(=O)C3=CC(=CC(=N3)C(=O)NC4=NC5=CC=CC=C5C(=C4)OCCN)OCCN)OCCN.Cl.Cl.Cl.Cl.Cl
- InChIKey
- SRIZPFGTXSQRFM-UHFFFAOYSA-N
- InChI
- show more
- Synonyms
- 4-(2-Aminoethoxy)N2,N6-bis[(4-(2-aminoethoxy)-2-quinolinyl]-2,6-pyridinecarboxamide pentahydrochloride
- Pyridostigmine Bromide, Acetylcholinesterase inhibitor10mM in DMSO● In Stock — US warehouse, ships to EU* Item #: P420313View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (1-methylpyridin-1-ium-3-yl) N,N-dimethylcarbamate;bromide
- SMILES
- C[N+]1=CC=CC(=C1)OC(=O)N(C)C.[Br-]
- InChIKey
- VNYBTNPBYXSMOO-UHFFFAOYSA-M
- InChI
- 1S/C9H13N2O2.BrH/c1-10(2)9(12)13-8-5-4-6-11(3)7-8;/h4-7H,1-3H3;1H/q+1;/p-1
- Synonyms
- PYRIDOSTIGMINE BROMIDE|101-26-8|Mestinon|Regonol|Kalimin|Kalymin|3-(Dimethylcarbamoyloxy)-1-methylpyridinium Bromide|...
- Pyrithioxin Dihydrochloride10mM in DMSO◐ .Made to order · 8–12 wks Item #: P420269View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 5-[[[5-hydroxy-4-(hydroxymethyl)-6-methylpyridin-3-yl]methyldisulfanyl]methyl]-4-(hydroxymethyl)-2-methylpyridin-3-ol;dihydrochloride
- SMILES
- CC1=NC=C(C(=C1O)CO)CSSCC2=CN=C(C(=C2CO)O)C.Cl.Cl
- InChIKey
- HRZWYHGGJOWGRI-UHFFFAOYSA-N
- InChI
- 1S/C16H20N2O4S2.2ClH/c1-9-15(21)13(5-19)11(3-17-9)7-23-24-8-12-4-18-10(2)16(22)14(12)6-20;;/h3-4,19-22H,5-8H2,1-2H3;2*1H
- Synonyms
- Pyrithioxin dihydrochloride|10049-83-9|Pyrithioxin (dihydrochloride)|Pyritinol dihydrochloride|Pyrithioxine hydrochlo...
- Pyrimidine-4,5,6-triamine◐ .Made to order · 8–12 wks Item #: P342687View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- pyrimidine-4,5,6-triamine
- SMILES
- C1=NC(=C(C(=N1)N)N)N
- InChIKey
- MPNBXFXEMHPGTK-UHFFFAOYSA-N
- InChI
- 1S/C4H7N5/c5-2-3(6)8-1-9-4(2)7/h1H,5H2,(H4,6,7,8,9)
- Synonyms
- EINECS 204-270-2 | 4,6-Pyrimidinetriamine | NSC 145059 | AC-907/34115032 | 4,5,6-Pyrimidinetriamine | 4,6-Triaminopyr...
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.