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
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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
24,638Navigate 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 for designing and evaluating ADC constructs.
PROTAC
2,815PROTAC and targeted protein degradation tools for discovery research. Browse degrader-related ligands, linkers, and building blocks to assemble or screen PROTAC designs, with clear identifiers for efficient selection.
By Signaling Pathways
102,614Explore 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
- Nutlin-3bCAS: 675576-97-3 Formula: C30H30Cl2N4O4 Molecular Weight: 581.4910mM in DMSO● In Stock — US Item #: N425398View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 4-[(4R,5S)-4,5-bis(4-chlorophenyl)-2-(4-methoxy-2-propan-2-yloxyphenyl)-4,5-dihydroimidazole-1-carbonyl]piperazin-2-one
- SMILES
- CC(C)OC1=C(C=CC(=C1)OC)C2=NC(C(N2C(=O)N3CCNC(=O)C3)C4=CC=C(C=C4)Cl)C5=CC=C(C=C5)Cl
- InChIKey
- BDUHCSBCVGXTJM-IZLXSDGUSA-N
- InChI
- show more
- Synonyms
- (+/-)-4-[4,5-Bis(4-chlorophenyl)-2-(2-isopropoxy-4-methoxy-phenyl)-4,5-dihydro-imidazole-1-carbonyl]-piperazin-2-one ...
- Nuzhenide● In Stock — US Item #: N414409View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
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- SMILES
- CC=C1C(C(=COC1OC2C(C(C(C(O2)CO)O)O)O)C(=O)OC)CC(=O)OCC3C(C(C(C(O3)OCCC4=CC=C(C=C4)O)O)O)O
- InChIKey
- STKUCSFEBXPTAY-DTYPFZMBSA-N
- InChI
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- Synonyms
- AKOS030573636 | CHEBI:183956 | DTXSID501346301 | (2S,4S,E)-Methyl 3-ethylidene-4-(2-oxo-2-(((2R,3S,4S,5R,6R)-3,4,5-tr...
- Nuzhenide10mM in DMSO● In Stock — US Item #: N423804View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
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- SMILES
- CC=C1C(C(=COC1OC2C(C(C(C(O2)CO)O)O)O)C(=O)OC)CC(=O)OCC3C(C(C(C(O3)OCCC4=CC=C(C=C4)O)O)O)O
- InChIKey
- STKUCSFEBXPTAY-DTYPFZMBSA-N
- InChI
- show more
- Synonyms
- AKOS030573636 | CHEBI:183956 | DTXSID501346301 | (2S,4S,E)-Methyl 3-ethylidene-4-(2-oxo-2-(((2R,3S,4S,5R,6R)-3,4,5-tr...
- Nylidrin HydrochlorideCAS: 849-55-8 Formula: C19H25NO2.HCl Molecular Weight: 335.87● In Stock — US Item #: N413257View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 4-[1-hydroxy-2-(4-phenylbutan-2-ylamino)propyl]phenol;hydrochloride
- SMILES
- CC(CCC1=CC=CC=C1)NC(C)C(C2=CC=C(C=C2)O)O.Cl
- InChIKey
- CLJHABUMMDMAFA-UHFFFAOYSA-N
- InChI
- 1S/C19H25NO2.ClH/c1-14(8-9-16-6-4-3-5-7-16)20-15(2)19(22)17-10-12-18(21)13-11-17;/h3-7,10-15,19-22H,8-9H2,1-2H3;1H
- Synonyms
- 12R07I1K8C | 4-(1-hydroxy-2-(4-phenylbutan-2-ylamino)propyl)phenol hydrochloride | AMY23363 | Buphenine HCl | EC69E3P...
- Nylidrin Hydrochloride10mM in Water● In Stock — US Item #: N426243View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 4-[1-hydroxy-2-(4-phenylbutan-2-ylamino)propyl]phenol;hydrochloride
- SMILES
- CC(CCC1=CC=CC=C1)NC(C)C(C2=CC=C(C=C2)O)O.Cl
- InChIKey
- CLJHABUMMDMAFA-UHFFFAOYSA-N
- InChI
- 1S/C19H25NO2.ClH/c1-14(8-9-16-6-4-3-5-7-16)20-15(2)19(22)17-10-12-18(21)13-11-17;/h3-7,10-15,19-22H,8-9H2,1-2H3;1H
- Synonyms
- 12R07I1K8C | 4-(1-hydroxy-2-(4-phenylbutan-2-ylamino)propyl)phenol hydrochloride | AMY23363 | Buphenine HCl | EC69E3P...
- Novobiocin Sodium (NSC 2382)CAS: 1476-53-5 EC Number: 216-023-6 PubChem CID: 54730021 Formula: C31H35N2NaO11 Molecular Weight: 634.61Liquid 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 Item #: N408341View ProductPricing & Pack Sizes
Technical Identifiers
- Synonyms
- Albamycin, Cathomycin | N-[7-[[3-O-(aminocarbonyl)-6-deoxy-5-C-methyl-4-O-methyl-α-L-lyxo-hexopyrano...
- Nystatin (Fungicidin)CAS: 62997-67-5 Formula: C53H85NO20 Molecular Weight: 1056.244400u/mg● In Stock — US Item #: N304208View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
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- SMILES
- CC1C=CC=CCCC=CC=CC=CC=CC(CC2C(C(CC(O2)(CC(C(CCC(CC(CC(CC(=O)OC(C(C1OC3CC(C(C(O3)C)O)O)C)C)O)O)O)O)O)O)O)C(=O)O)OC4C(C(C(C(O4)C)O)N)O
- InChIKey
- IKYMLQOHQLVORI-PLAPNZKPSA-N
- InChI
- show more
- Synonyms
- (1S,3R,4R,7R,9R,11R,15S,16S,17R,18S,19E,21E,25E,27E,29E,31E,33R,35S,36R,37S)-33-[(3-amino-3,6-dideoxy-beta-D-mannopyr...
- Norgestrel, Progesterone receptor agonist● In Stock — US Item #: N413314View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (8R,9S,10R,13S,14S,17R)-13-ethyl-17-ethynyl-17-hydroxy-1,2,6,7,8,9,10,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-3-one
- SMILES
- CCC12CCC3C(C1CCC2(C#C)O)CCC4=CC(=O)CCC34
- InChIKey
- WWYNJERNGUHSAO-XUDSTZEESA-N
- InChI
- 1S/C21H28O2/c1-3-20-11-9-17-16-8-6-15(22)13-14(16)5-7-18(17)19(20)10-12-21(20,23)4-2/h2,13,16-19,23H,3,5-12H2,1H3/t16-,17+,18+,19-,20-,21-/m0/s1
- Synonyms
- Levonorgestrelum | (8R,9S,10R,13S,14S,17R)-13-ethyl-17-ethynyl-17-hydroxy-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro...
- Norgestrel, Progesterone receptor agonist10mM in DMSO● In Stock — US Item #: N425303View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (8R,9S,10R,13S,14S,17R)-13-ethyl-17-ethynyl-17-hydroxy-1,2,6,7,8,9,10,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-3-one
- SMILES
- CCC12CCC3C(C1CCC2(C#C)O)CCC4=CC(=O)CCC34
- InChIKey
- WWYNJERNGUHSAO-XUDSTZEESA-N
- InChI
- 1S/C21H28O2/c1-3-20-11-9-17-16-8-6-15(22)13-14(16)5-7-18(17)19(20)10-12-21(20,23)4-2/h2,13,16-19,23H,3,5-12H2,1H3/t16-,17+,18+,19-,20-,21-/m0/s1
- Synonyms
- Levonorgestrel|norgestrel|797-63-7|D-Norgestrel|Mirena|(-)-Norgestrel|Levonova|Microval|Postinor|Plan B|NORPLANT|Jade...
- NucleozinCAS: 341001-38-5 Formula: C21H19ClN4O4 Molecular Weight: 426.8510mM in DMSO● In Stock — US Item #: N423482View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- [4-(2-chloro-4-nitrophenyl)piperazin-1-yl]-(5-methyl-3-phenyl-1,2-oxazol-4-yl)methanone
- SMILES
- CC1=C(C(=NO1)C2=CC=CC=C2)C(=O)N3CCN(CC3)C4=C(C=C(C=C4)[N+](=O)[O-])Cl
- InChIKey
- OWXBJAPOSQSWAO-UHFFFAOYSA-N
- InChI
- 1S/C21H19ClN4O4/c1-14-19(20(23-30-14)15-5-3-2-4-6-15)21(27)25-11-9-24(10-12-25)18-8-7-16(26(28)29)13-17(18)22/h2-8,13H,9-12H2,1H3
- Synonyms
- 1-(2-Chloro-4-nitrophenyl)-4-[(5-methyl-3-phenyl-4-isoxazolyl)carbonyl]-piperazine，Nucleozin，[4-(2-Chloro-4-nitro-phe...
- NorisoboldineCAS: 23599-69-1 Formula: C18H19NO4 Molecular Weight: 313.3510mM in DMSO● In Stock — US Item #: N422768View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (6aS)-2,10-dimethoxy-5,6,6a,7-tetrahydro-4H-dibenzo[de,g]quinoline-1,9-diol
- SMILES
- COC1=C(C2=C3C(CC4=CC(=C(C=C42)OC)O)NCCC3=C1)O
- InChIKey
- HORZNQYQXBFWNZ-LBPRGKRZSA-N
- InChI
- 1S/C18H19NO4/c1-22-14-8-11-10(6-13(14)20)5-12-16-9(3-4-19-12)7-15(23-2)18(21)17(11)16/h6-8,12,19-21H,3-5H2,1-2H3/t12-/m0/s1
- Synonyms
- (S)-(+)-Laurelliptine | BS-42172 | Norisoboldine, (+)- | AC-34581 | (+)-N-Norisoboldine | CCG-267616 | 4H-Dibenzo[de,...
- O-304CAS: 1261289-04-6 Formula: C16H11Cl2N3O2S Molecular Weight: 380.25● In Stock — US Item #: O412548View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 4-chloro-N-[2-[(4-chlorophenyl)methyl]-3-oxo-1,2,4-thiadiazol-5-yl]benzamide
- SMILES
- C1=CC(=CC=C1CN2C(=O)N=C(S2)NC(=O)C3=CC=C(C=C3)Cl)Cl
- InChIKey
- WEDWLYRQKUTOAX-UHFFFAOYSA-N
- InChI
- 1S/C16H11Cl2N3O2S/c17-12-5-1-10(2-6-12)9-21-16(23)20-15(24-21)19-14(22)11-3-7-13(18)8-4-11/h1-8H,9H2,(H,19,20,22,23)
- Synonyms
- O-304XBenzamide,4-chloro-N-[2-[(4-chlorophenyl)methyl]-2,3-dihydro-3-oxo-1,2,4-thiadiazol-5-yl]-
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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.