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
24,635Navigate 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
- Lerisetron● In Stock — US warehouse, ships to EU* Item #: L412789View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 1-benzyl-2-piperazin-1-ylbenzimidazole
- SMILES
- C1CN(CCN1)C2=NC3=CC=CC=C3N2CC4=CC=CC=C4
- InChIKey
- PWWDCRQZITYKDV-UHFFFAOYSA-N
- InChI
- 1S/C18H20N4/c1-2-6-15(7-3-1)14-22-17-9-5-4-8-16(17)20-18(22)21-12-10-19-11-13-21/h1-9,19H,10-14H2
- Synonyms
- PWWDCRQZITYKDV-UHFFFAOYSA-N | Lerisetron [INN] | Q6528811 | 1-benzyl-2-piperazin-1-ylbenzimidazole. | BCP33052 | s264...
- Lerisetron10mM in DMSO● In Stock — US warehouse, ships to EU* Item #: L421596View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 1-benzyl-2-piperazin-1-ylbenzimidazole
- SMILES
- C1CN(CCN1)C2=NC3=CC=CC=C3N2CC4=CC=CC=C4
- InChIKey
- PWWDCRQZITYKDV-UHFFFAOYSA-N
- InChI
- 1S/C18H20N4/c1-2-6-15(7-3-1)14-22-17-9-5-4-8-16(17)20-18(22)21-12-10-19-11-13-21/h1-9,19H,10-14H2
- Synonyms
- PWWDCRQZITYKDV-UHFFFAOYSA-N | Lerisetron [INN] | Q6528811 | 1-benzyl-2-piperazin-1-ylbenzimidazole. | BCP33052 | s264...
- Letaxaban-d5, Coagulation factor X inhibitorCAS: 870262-90-1 Formula: C22H26ClN3O5S Molecular Weight: 479.98◐ .Made to order · 8–12 wks Item #: L353475View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 1-[1-[(2S)-3-(6-chloronaphthalen-2-yl)sulfonyl-2-hydroxypropanoyl]piperidin-4-yl]-1,3-diazinan-2-one
- SMILES
- C1CNC(=O)N(C1)C2CCN(CC2)C(=O)C(CS(=O)(=O)C3=CC4=C(C=C3)C=C(C=C4)Cl)O
- InChIKey
- GEHAEMCVKDPMKO-HXUWFJFHSA-N
- InChI
- show more
- Synonyms
- BDBM50317098 | Q27294227 | SCHEMBL766143 | 3kl6 | (S)-1-(1-(3-((6-chloronaphthalen-2-yl)sulfonyl)-2-hydroxypropanoyl)...
- Ledipasvir acetone● In Stock — US warehouse, ships to EU* Item #: L413102View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- show more
- SMILES
- CC(C)C(C(=O)N1CC2(CC2)CC1C3=NC=C(N3)C4=CC5=C(C=C4)C6=C(C5(F)F)C=C(C=C6)C7=CC8=C(C=C7)N=C(N8)C9C1CCC(C1)N9C(=O)C(C(C)C)NC(=O)OC)NC(=O)OC.CC(=O)C
- InChIKey
- FJPWYOHJVGOKNZ-NDANSHMASA-N
- InChI
- show more
- Synonyms
- AKOS030524068 | I11799 | Ledipasvir acetone | UNII-3J78ET35HX | EX-A1089 | Ledipasvir acetonate (JAN) | Carbamic acid...
- Lefamulin acetate (Xenleta), Bacterial 70S ribosome inhibitorCAS: 1350636-82-6 EC Number: 695-920-8 PubChem CID: 86346053 Formula: C3OH49NO7S Molecular Weight: 567.78Solid Moligand™ ? Moligand™ — Aladdin's line of ligands and bioactive small molecules. Use for receptor, pathway, and binding studies needing defined small-molecule tools. ≥98%● In Stock — US warehouse, ships to EU* Item #: L412984View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- show more
- SMILES
- CC1CCC23CCC(=O)C2C1(C(CC(C(C3C)O)(C)C=C)OC(=O)CSC4CCC(CC4O)N)C.CC(=O)O
- InChIKey
- WSMXIQXWHPSVDE-ZPJPNJFZSA-N
- InChI
- show more
- Synonyms
- BC-3781 acetate | DTXSID801027897 | AT18250 | Lefamulinacetate | Q27279882 | D11632 | MS-30273 | Lefamulin (acetate) ...
- Letrozole (CGS 20267), Cytochrome P450 19A1 inhibitorMoligand™ ? 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 #: L409113View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- 4,4'-(1H-1,2,4-triazol-1-ylmethylene)bis-benzonitrile
- Lefamulin acetate (Xenleta), Bacterial 70S ribosome inhibitorCAS: 1350636-82-6 EC Number: 695-920-8 PubChem CID: 86346053 Formula: C3OH49NO7S Molecular Weight: 567.7810mM in DMSO● In Stock — US warehouse, ships to EU* Item #: L421318View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- BC-3781 acetateAcetic acid | 2-[[(1R,2R,4R)-4-amino-2-hydroxycyclohexyl]thio]-,(3aS,4R,5S,6S,8R,9R,9...
- Leflunomide (HWA486), Dihydroorotate dehydrogenase inhibitorMoligand™ ? 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 #: L408176View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- RS-34821, SU101, Arava | 5-methyl-N-(4-(trifluoromethyl)phenyl)isoxazole-4-carboxamide
- Levobupivacaine hydrochloride, Sodium channel protein type IV alpha subunit blocker10mM in DMSO● In Stock — US warehouse, ships to EU* Item #: L422961View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (2S)-1-butyl-N-(2,6-dimethylphenyl)piperidine-2-carboxamide;hydrochloride
- SMILES
- CCCCN1CCCCC1C(=O)NC2=C(C=CC=C2C)C.Cl
- InChIKey
- SIEYLFHKZGLBNX-NTISSMGPSA-N
- InChI
- 1S/C18H28N2O.ClH/c1-4-5-12-20-13-7-6-11-16(20)18(21)19-17-14(2)9-8-10-15(17)3;/h8-10,16H,4-7,11-13H2,1-3H3,(H,19,21);1H/t16-;/m0./s1
- Synonyms
- 27262-48-2 (HCl) | LEVOBUPIVACAINE HCL [VANDF] | Q27114682 | 2-Piperidinecarboxamide, 1-butyl-N-(2,6-dimethylphenyl)-...
- Liarozole (R75251) dihydrochlorideSolid 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 #: L413536View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 6-[(3-chlorophenyl)-imidazol-1-ylmethyl]-1H-benzimidazole;dihydrochloride
- SMILES
- C1=CC(=CC(=C1)Cl)C(C2=CC3=C(C=C2)N=CN3)N4C=CN=C4.Cl.Cl
- InChIKey
- NKDMRTVUEJWCCQ-UHFFFAOYSA-N
- InChI
- 1S/C17H13ClN4.2ClH/c18-14-3-1-2-12(8-14)17(22-7-6-19-11-22)13-4-5-15-16(9-13)21-10-20-15;;/h1-11,17H,(H,20,21);2*1H
- Synonyms
- 6-[(3-chlorophenyl)-imidazol-1-ylmethyl]-1H-benzimidazole;dihydrochloride | R75251 dihydrochloride | SCHEMBL18095564 ...
- Levistilide ACAS: 88182-33-6 Formula: C24H28O4 Molecular Weight: 380.4810mM in DMSO● In Stock — US warehouse, ships to EU* Item #: L426663View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (1S,2S,6Z,10S,11S,16Z)-6,16-di(butylidene)-5,15-dioxapentacyclo[9.5.2.01,13.02,10.03,7]octadeca-3(7),12-diene-4,14-dione
- SMILES
- CCCC=C1C2=C(C3C(CC2)C4CCC35C(=C4)C(=O)OC5=CCCC)C(=O)O1
- InChIKey
- UBBRXVRQZJSDAK-ZJHGLIIDSA-N
- InChI
- show more
- Synonyms
- Levistilide A | LevistilideA | Levistilide-A | Q27136724 | AKOS037514718 | Diligustilide | HY-N1472 | 1H-5,10c-Ethano...
- Levobetaxolol HCl, Beta-1 adrenergic receptor antagonistCAS: 116209-55-3 Formula: C18H29NO3.HCl Molecular Weight: 343.8910mM in DMSO● In Stock — US warehouse, ships to EU* Item #: L420744View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (2S)-1-[4-[2-(cyclopropylmethoxy)ethyl]phenoxy]-3-(propan-2-ylamino)propan-2-ol;hydrochloride
- SMILES
- CC(C)NCC(COC1=CC=C(C=C1)CCOCC2CC2)O.Cl
- InChIKey
- CHDPSNLJFOQTRK-LMOVPXPDSA-N
- InChI
- 1S/C18H29NO3.ClH/c1-14(2)19-11-17(20)13-22-18-7-5-15(6-8-18)9-10-21-12-16-3-4-16;/h5-8,14,16-17,19-20H,3-4,9-13H2,1-2H3;1H/t17-;/m0./s1
- Synonyms
- 2-Propanol, 1-(4-(2-(cyclopropylmethoxy)ethyl)phenoxy)-3-((1-methylethyl)amino)-, hydrochloride, (S)- | 8MR4W4O06J | ...
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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.