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
- Levocetirizine dihydrochloride, Histamine H1 receptor antagonistCAS: 130018-87-0 EC Number: 641-093-3 PubChem CID: 9955977 Formula: C21H25ClN2O3·2HCl Molecular Weight: 461.8110mM in DMSO● In Stock — US warehouse, ships to EU* Item #: L421171View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2-[2-[4-[(R)-(4-chlorophenyl)-phenylmethyl]piperazin-1-yl]ethoxy]acetic acid;dihydrochloride
- SMILES
- C1CN(CCN1CCOCC(=O)O)C(C2=CC=CC=C2)C3=CC=C(C=C3)Cl.Cl.Cl
- InChIKey
- PGLIUCLTXOYQMV-GHVWMZMZSA-N
- InChI
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- Synonyms
- (R)-2-(2-(4-((4-Chlorophenyl)(phenyl)methyl)piperazin-1-yl)ethoxy)acetic acid dihydrochloride | good sense levocetiri...
- LevofloxacinMoligand™ ? 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 #: L407938View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- Fluoroquinolone | (3S)-9-fluoro-2,3-dihydro-3-methyl-10-(4-methyl-1-piperazinyl)-7-oxo-7H-pyrido[1,2,...
- Levofloxacin hemihydrateCAS: 138199-71-0 EC Number: 604-067-2 PubChem CID: 3033924 Formula: C18H20FN3O4 · 0.5H2O Molecular Weight: 370.3810mM in DMSO● In Stock — US warehouse, ships to EU* Item #: L421442View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (2S)-7-fluoro-2-methyl-6-(4-methylpiperazin-1-yl)-10-oxo-4-oxa-1-azatricyclo[7.3.1.05,13]trideca-5(13),6,8,11-tetraene-11-carboxylic acid;hydrate
- SMILES
- CC1COC2=C3N1C=C(C(=O)C3=CC(=C2N4CCN(CC4)C)F)C(=O)O.CC1COC2=C3N1C=C(C(=O)C3=CC(=C2N4CCN(CC4)C)F)C(=O)O.O
- InChIKey
- SUIQUYDRLGGZOL-RCWTXCDDSA-N
- InChI
- show more
- Synonyms
- Levofloxacin Hemihydrate|138199-71-0|Levofloxacin hydrate|Dynaquin|6GNT3Y5LMF|Levofloxacin (hydrate)|UNII-6GNT3Y5LMF|...
- Levosimendan, Troponin, cardiac muscle positive modulatorLiquid 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 #: L407801View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- (R)-2-(2-(4-(4-methyl-6-oxo-1,4,5,6-tetrahydropyridazin-3-yl)phenyl)hydrazono)malononitrile
- Levosulpiride, Serotonin 4 (5-HT4) receptor agonistMoligand™ ? 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 #: L407811View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- 5-(aminosulfonyl)-N-[[(2S)-1-ethyl-2-pyrrolidinyl]methyl]-2-methoxy-benzamide
- Leukadherin-1CAS: 344897-95-6 Formula: C22H15NO4S2 Molecular Weight: 421.4910mM in DMSO● In Stock — US warehouse, ships to EU* Item #: L423514View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 4-[5-[(Z)-(3-benzyl-4-oxo-2-sulfanylidene-1,3-thiazolidin-5-ylidene)methyl]furan-2-yl]benzoic acid
- SMILES
- C1=CC=C(C=C1)CN2C(=O)C(=CC3=CC=C(O3)C4=CC=C(C=C4)C(=O)O)SC2=S
- InChIKey
- AEZGRQSLKVNPCI-UNOMPAQXSA-N
- InChI
- 1S/C22H15NO4S2/c24-20-19(29-22(28)23(20)13-14-4-2-1-3-5-14)12-17-10-11-18(27-17)15-6-8-16(9-7-15)21(25)26/h1-12H,13H2,(H,25,26)/b19-12-
- Synonyms
- Leukadherin 1 | SCHEMBL18301010 | HY-15701 | (Z)-4-(5-((3-benzyl-4-oxo-2-thioxothiazolidin-5-ylidene)methyl)furan-2-y...
- Levomilnacipran hydrochloride, Norepinephrine transporter inhibitor10mM in DMSO● In Stock — US warehouse, ships to EU* Item #: L422145View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (1S,2R)-2-(aminomethyl)-N,N-diethyl-1-phenylcyclopropane-1-carboxamide;hydrochloride
- SMILES
- CCN(CC)C(=O)C1(CC1CN)C2=CC=CC=C2.Cl
- InChIKey
- XNCDYJFPRPDERF-NQQJLSKUSA-N
- InChI
- 1S/C15H22N2O.ClH/c1-3-17(4-2)14(18)15(10-13(15)11-16)12-8-6-5-7-9-12;/h5-9,13H,3-4,10-11,16H2,1-2H3;1H/t13-,15+;/m0./s1
- Synonyms
- (1S-cis)-Milnacipran Hydrochloride | A899431 | Midalcipran hydrochloride | 371U2ZK31U | F 2695 hydrochloride | F-2695...
- Leuprolide AcetateCAS: 74381-53-6 EC Number: 686-285-8 Formula: C59H84N16O12（free base） Molecular Weight: 1209.4（free base）● In Stock — US warehouse, ships to EU* Item #: L489354View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- show more
- SMILES
- show more
- InChIKey
- RGLRXNKKBLIBQS-XNHQSDQCSA-N
- InChI
- show more
- Synonyms
- TAP-144 | LEUPROLIDE ACETATE (USP MONOGRAPH) | 37JNS02E7V | DTXSID7049009 | ELIGARD KIT | Viadur | Lucrin Depot | Ena...
- Leuprolide AcetateCAS: 74381-53-6 EC Number: 686-285-8 Formula: C59H84N16O12（free base） Molecular Weight: 1209.4（free base）10mM in DMSO● In Stock — US warehouse, ships to EU* Item #: L408693View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- Leuprorelin Acetate | 1-9-Luteinizing hormone-releasing factor (swine), 6-D-leucine-9-(N-ethyl-L-prolinami...
- Leuprolide TFACAS: 53714-56-0(free) Formula: C59H84N16O12· C2HF3O2 Molecular Weight: 1323.41Solid ≥98%● In Stock — US warehouse, ships to EU* Item #: L407162View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- Leuprorelin | Leuprolide | [Des-Gly10, D-Leu6, Pro-NHEt9]LH-RH
- Levalbuterol tartrate10mM in DMSO● In Stock — US warehouse, ships to EU* Item #: L425329View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 4-[(1R)-2-(tert-butylamino)-1-hydroxyethyl]-2-(hydroxymethyl)phenol;(2R,3R)-2,3-dihydroxybutanedioic acid
- SMILES
- CC(C)(C)NCC(C1=CC(=C(C=C1)O)CO)O.C(C(C(=O)O)O)(C(=O)O)O
- InChIKey
- SQOXPNYIJRDVRE-RVHANOPWSA-N
- InChI
- show more
- Synonyms
- (R)-4-(2-(tert-Butylamino)-1-hydroxyethyl)-2-(hydroxymethyl)phenol (2R,3R)-2,3-dihydroxysuccinate|(R)-4-(2-(tert-Buty...
- Levalbuterol tartrate● In Stock — US warehouse, ships to EU* Item #: L412848View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 4-[(1R)-2-(tert-butylamino)-1-hydroxyethyl]-2-(hydroxymethyl)phenol;(2R,3R)-2,3-dihydroxybutanedioic acid
- SMILES
- CC(C)(C)NCC(C1=CC(=C(C=C1)O)CO)O.C(C(C(=O)O)O)(C(=O)O)O
- InChIKey
- SQOXPNYIJRDVRE-RVHANOPWSA-N
- InChI
- show more
- Synonyms
- (R)-4-(2-(tert-butylamino)-1-hydroxyethyl)-2-(hydroxymethyl)phenol (2R,3R)-2,3-dihydroxysuccinic acid | (R)-4-(2-(ter...
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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.