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).
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Ligand families
24,639Navigate 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
2,815PROTAC 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
102,615Explore 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
- Diphenyleneiodonium◐ Made to order · 8–12 wks Item #: D667789View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 8-iodoniatricyclo[7.4.0.02,7]trideca-1(13),2,4,6,9,11-hexaene
- SMILES
- C1=CC=C2C(=C1)C3=CC=CC=C3[I+]2
- InChIKey
- QFXKXRXFBRLLPQ-UHFFFAOYSA-N
- InChI
- 1S/C12H8I/c1-3-7-11-9(5-1)10-6-2-4-8-12(10)13-11/h1-8H/q+1
- Synonyms
- Diphenyleneiodonium|Dibenziodolium|2,2'-Biphenylyleneiodonium|dibenzo[b,d]iodolium|(1,1'-Biphenyl)-2,2'-diyliodonium|...
- ElliptiniumCAS: 58337-34-1 Formula: C18H17N2O⁺ Molecular Weight: 277.3◐ Made to order · 8–12 wks Item #: E667902View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2,5,11-trimethyl-6H-pyrido[4,3-b]carbazol-2-ium-9-ol
- SMILES
- CC1=C2C=C[N+](=CC2=C(C3=C1NC4=C3C=C(C=C4)O)C)C
- InChIKey
- YZQRAQOSAPWELU-UHFFFAOYSA-O
- InChI
- 1S/C18H16N2O/c1-10-15-9-20(3)7-6-13(15)11(2)18-17(10)14-8-12(21)4-5-16(14)19-18/h4-9,21H,1-3H3/p+1
- Synonyms
- Elliptinium|Elliptinium ion|Elliptinium cation|2-Methyl-9-hydroxyellipticinium|2,5,11-trimethyl-6H-pyrido[4,3-b]carba...
- Enrasentan, Endothelin receptor ET-B antagonist◐ Made to order · 8–12 wks Item #: E668117View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (1S,2R,3S)-1-(1,3-benzodioxol-5-yl)-3-[2-(2-hydroxyethoxy)-4-methoxyphenyl]-5-propoxy-2,3-dihydro-1H-indene-2-carboxylic acid
- SMILES
- CCCOC1=CC2=C(C=C1)C(C(C2C3=C(C=C(C=C3)OC)OCCO)C(=O)O)C4=CC5=C(C=C4)OCO5
- InChIKey
- GLCKXJLCYIJMRB-UPRLRBBYSA-N
- InChI
- show more
- Synonyms
- enrasentan|SB-217242|Enrasentan [INN]|SB 217242|(1S,2R,3S)-3-(2-(2-Hydroxyethoxy)-4-methoxyphenyl)-1-(3,4-(methylened...
- Ethyl 1-(aminomethyl)-6,8-dimethoxyisoquinoline-4-carboxylateCAS: 784127-15-7 Formula: C15H18N2O4 Molecular Weight: 290.31◐ Made to order · 8–12 wks Item #: E669165View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- ethyl 1-(aminomethyl)-6,8-dimethoxyisoquinoline-4-carboxylate
- SMILES
- CCOC(=O)C1=CN=C(C2=C1C=C(C=C2OC)OC)CN
- InChIKey
- YWERKLDMXHCBDE-UHFFFAOYSA-N
- InChI
- 1S/C15H18N2O4/c1-4-21-15(18)11-8-17-12(7-16)14-10(11)5-9(19-2)6-13(14)20-3/h5-6,8H,4,7,16H2,1-3H3
- Synonyms
- ETHYL 1-(AMINOMETHYL)-6,8-DIMETHOXYISOQUINOLINE-4-CARBOXYLATE|1-Aminomethyl-6,8-dimethoxy-isoquinoline-4-carboxylic a...
- Ethanone, 1-[3-fluoro-4-[4-[2-(4-morpholinyl)-5-nitrobenzoyl]-1-piperazinyl]phenyl]-CAS: 310415-30-6 Formula: C23H25FN4O5 Molecular Weight: 456.5◐ Made to order · 8–12 wks Item #: E669139View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 1-[3-fluoro-4-[4-(2-morpholin-4-yl-5-nitrobenzoyl)piperazin-1-yl]phenyl]ethanone
- SMILES
- CC(=O)C1=CC(=C(C=C1)N2CCN(CC2)C(=O)C3=C(C=CC(=C3)[N+](=O)[O-])N4CCOCC4)F
- InChIKey
- NEFFMZJKQNSKMQ-UHFFFAOYSA-N
- InChI
- 1S/C23H25FN4O5/c1-16(29)17-2-4-22(20(24)14-17)25-6-8-27(9-7-25)23(30)19-15-18(28(31)32)3-5-21(19)26-10-12-33-13-11-26/h2-5,14-15H,6-13H2,1H3
- Synonyms
- Ethanone, 1-[3-fluoro-4-[4-[2-(4-morpholinyl)-5-nitrobenzoyl]-1-piperazinyl]phenyl]-|1-[3-fluoro-4-[4-(2-morpholin-4-...
- Ethyl 2-(4-amino-5,6-dimethylthiopheno[2,3-d]pyrimidin-2-ylthio)acetate◐ Made to order · 8–12 wks Item #: E668417View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- ethyl 2-(4-amino-5,6-dimethylthieno[2,3-d]pyrimidin-2-yl)sulfanylacetate
- SMILES
- CCOC(=O)CSC1=NC(=C2C(=C(SC2=N1)C)C)N
- InChIKey
- MTIJJOSOEBIMHV-UHFFFAOYSA-N
- InChI
- 1S/C12H15N3O2S2/c1-4-17-8(16)5-18-12-14-10(13)9-6(2)7(3)19-11(9)15-12/h4-5H2,1-3H3,(H2,13,14,15)
- Synonyms
- ethyl 2-(4-amino-5,6-dimethylthiopheno[2,3-d]pyrimidin-2-ylthio)acetate|ethyl 2-(4-amino-5,6-dimethylthieno[2,3-d]pyr...
- 17β-Estradiol 3-O-Sulfate (sodium salt)CAS: 4999-79-5 Formula: C18H23O5S • Na Molecular Weight: 374.43Solid ≥98%● In Stock — US warehouse, ships to EU* Item #: E667939View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- sodium;[(8R,9S,13S,14S,17S)-17-hydroxy-13-methyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthren-3-yl] sulfate
- SMILES
- CC12CCC3C(C1CCC2O)CCC4=C3C=CC(=C4)OS(=O)(=O)[O-].[Na+]
- InChIKey
- LMJQCTISQYSLPF-CMZLOHJFSA-M
- InChI
- show more
- Synonyms
- Estradiol-3-sulfate|Estradiol-17beta 3-sulfate|Estradiol 3-sulphate|17beta-estradiol 3-sulfate|[(8R,9S,13S,14S,17S)-1...
- Estradiol acetate, Estrogen receptor alpha agonist◐ Made to order · 8–12 wks Item #: E669013View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- [(8R,9S,13S,14S,17S)-17-hydroxy-13-methyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthren-3-yl] acetate
- SMILES
- CC(=O)OC1=CC2=C(C=C1)C3CCC4(C(C3CC2)CCC4O)C
- InChIKey
- FHXBMXJMKMWVRG-SLHNCBLASA-N
- InChI
- 1S/C20H26O3/c1-12(21)23-14-4-6-15-13(11-14)3-5-17-16(15)9-10-20(2)18(17)7-8-19(20)22/h4,6,11,16-19,22H,3,5,7-10H2,1-2H3/t16-,17-,18+,19+,20+/m1/s1
- Synonyms
- Femring|Femtrace|Estradiol 3-acetate|Menoring|3-O-Acetylestradiol|beta-Estradiol 3-acetate|17beta-Estradiol 3-acetate...
- Eptastigmine◐ Made to order · 8–12 wks Item #: E667934View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- [(3aR,8bS)-3,4,8b-trimethyl-2,3a-dihydro-1H-pyrrolo[2,3-b]indol-7-yl] N-heptylcarbamate
- SMILES
- CCCCCCCNC(=O)OC1=CC2=C(C=C1)N(C3C2(CCN3C)C)C
- InChIKey
- RRGMXBQMCUKRLH-CTNGQTDRSA-N
- InChI
- 1S/C21H33N3O2/c1-5-6-7-8-9-13-22-20(25)26-16-10-11-18-17(15-16)21(2)12-14-23(3)19(21)24(18)4/h10-11,15,19H,5-9,12-14H2,1-4H3,(H,22,25)/t19-,21+/m1/s1
- Synonyms
- Eptastigmine|Eptastigmine [INN]|N-Demethyl-N-heptylphysostigmine|heptastigmine|Heptylphysostigmine|Physostigmine hept...
- Ethyl 2-(adamantane-1-carbonylamino)-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxylate◐ Made to order · 8–12 wks Item #: E668743View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- ethyl 2-(adamantane-1-carbonylamino)-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxylate
- SMILES
- CCOC(=O)C1=C(SC2=C1CCCC2)NC(=O)C34CC5CC(C3)CC(C5)C4
- InChIKey
- KFAHCXHRNCAASD-UHFFFAOYSA-N
- InChI
- 1S/C22H29NO3S/c1-2-26-20(24)18-16-5-3-4-6-17(16)27-19(18)23-21(25)22-10-13-7-14(11-22)9-15(8-13)12-22/h13-15H,2-12H2,1H3,(H,23,25)
- Synonyms
- ethyl 2-(adamantanylcarbonylamino)-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carbo xylate|ethyl 2-[(tricyclo[3.3.1.1~3,7~...
- Etilefrine pivalateCAS: 85750-39-6 Formula: C15H23NO3 Molecular Weight: 265.35◐ Made to order · 8–12 wks Item #: E668092View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- [3-[2-(ethylamino)-1-hydroxyethyl]phenyl] 2,2-dimethylpropanoate
- SMILES
- CCNCC(C1=CC(=CC=C1)OC(=O)C(C)(C)C)O
- InChIKey
- DRMHNJGOEAYOIZ-UHFFFAOYSA-N
- InChI
- 1S/C15H23NO3/c1-5-16-10-13(17)11-7-6-8-12(9-11)19-14(18)15(2,3)4/h6-9,13,16-17H,5,10H2,1-4H3
- Synonyms
- Etilefrine pivalate|Etilefrine pivalate [INN]|Pivalate d'etilefrine|Etilefrini pivalas|Pivalato de etilefrina|Etilefr...
- Ethyl 2-(acetylamino)-7-methoxy-1-benzothiophene-3-carboxylateFormula: C14H15NO4S Molecular Weight: 293.34◐ Made to order · 8–12 wks Item #: E668432View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- ethyl 2-acetamido-7-methoxy-1-benzothiophene-3-carboxylate
- SMILES
- CCOC(=O)C1=C(SC2=C1C=CC=C2OC)NC(=O)C
- InChIKey
- YWXRVYOGFMDDRZ-UHFFFAOYSA-N
- InChI
- 1S/C14H15NO4S/c1-4-19-14(17)11-9-6-5-7-10(18-3)12(9)20-13(11)15-8(2)16/h5-7H,4H2,1-3H3,(H,15,16)
- Synonyms
- ethyl 2-(acetylamino)-7-methoxy-1-benzothiophene-3-carboxylate|2-Acetylamino-7-methoxy-benzo[b]thiophene-3-carboxylic...
![Ethanone, 1-[3-fluoro-4-[4-[2-(4-morpholinyl)-5-nitrobenzoyl]-1-piperazinyl]phenyl]- - CAS No(310415-30-6) by Aladdin Scientific](https://www.aladdinsci.com/media/catalog/product/cache/6360e336b2a70951114dbd37294096ee/E/6/E669139.jpg)
![Ethyl 2-(4-amino-5,6-dimethylthiopheno[2,3-d]pyrimidin-2-ylthio)acetate - CAS No(146381-66-0) by Aladdin Scientific](https://www.aladdinsci.com/media/catalog/product/cache/6360e336b2a70951114dbd37294096ee/E/6/E668417.jpg)
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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.
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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.
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