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
24,635Navigate 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
- 5,10,15,20-tetrakis(4-methylphenyl)porphyrinatoiron(III) chloride● In Stock — US warehouse, ships to EU* Item #: I305301View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- iron(3+);5,10,15,20-tetrakis(4-methylphenyl)porphyrin-22,24-diide;chloride
- SMILES
- CC1=CC=C(C=C1)C2=C3C=CC(=C(C4=NC(=C(C5=CC=C([N-]5)C(=C6C=CC2=N6)C7=CC=C(C=C7)C)C8=CC=C(C=C8)C)C=C4)C9=CC=C(C=C9)C)[N-]3.[Cl-].[Fe+3]
- InChIKey
- ULLBMEVRMAFVTQ-UHFFFAOYSA-M
- InChI
- show more
- 1,3,5-tris(2-formylpyridin-5-yl)benzeneCAS: 1482413-54-6 Formula: C24H15N3O3 Molecular Weight: 393.39Solid ≥98%◐ .Made to order · 8–12 wks Item #: B302934View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 6-[3,5-bis(6-formylpyridin-3-yl)phenyl]pyridine-3-carbaldehyde
- SMILES
- C1=CC(=NC=C1C=O)C2=CC(=CC(=C2)C3=CN=C(C=C3)C=O)C4=CN=C(C=C4)C=O
- InChIKey
- NRHFDDLPTAGBNV-UHFFFAOYSA-N
- InChI
- 1S/C24H15N3O3/c28-13-16-1-6-24(27-10-16)21-8-19(17-2-4-22(14-29)25-11-17)7-20(9-21)18-3-5-23(15-30)26-12-18/h1-15H
- Synonyms
- 5,5'-(5-(5-Formylpyridin-2-yl)-1,3-phenylene)dipicolinaldehyde | 5,5',5''-(benzene-1,3,5-triyl)tripicolinaldehyde
- 5,5-difluoro-1,3,7,9-tetramethyl-10-phenyl-2,8-di(pyridin-4-yl)-5H-dipyrrolo[1,2-c:2',1'-f][1,3,2]diazaborinin-4-ium-5-uideCAS: 1337979-86-8 Formula: C29H25BF2N4 Molecular Weight: 478.3● In Stock — US warehouse, ships to EU* Item #: H302422View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2,2-difluoro-4,6,10,12-tetramethyl-8-phenyl-5,11-dipyridin-4-yl-3-aza-1-azonia-2-boranuidatricyclo[7.3.0.03,7]dodeca-1(12),4,6,8,10-pentaene
- SMILES
- [B-]1(N2C(=C(C(=C2C(=C3[N+]1=C(C(=C3C)C4=CC=NC=C4)C)C5=CC=CC=C5)C)C6=CC=NC=C6)C)(F)F
- InChIKey
- KDOFHEZVMVCAMJ-UHFFFAOYSA-N
- InChI
- 1S/C29H25BF2N4/c1-18-25(23-10-14-33-15-11-23)20(3)35-28(18)27(22-8-6-5-7-9-22)29-19(2)26(24-12-16-34-17-13-24)21(4)36(29)30(35,31)32/h5-17H,1-4H3
- 5,5-difluoro-2,8-diformyl-1,3,7,9-tetramethyl-10-phenyl-5H-dipyrrolo[1,2-c:2',1'-f][1,3,2]diazaborinin-4-ium-5-uideCAS: 2022166-57-8 Formula: C21H19BF2N2O2 Molecular Weight: 380.19● In Stock — US warehouse, ships to EU* Item #: H302718View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2,2-difluoro-4,6,10,12-tetramethyl-8-phenyl-3-aza-1-azonia-2-boranuidatricyclo[7.3.0.03,7]dodeca-1(12),4,6,8,10-pentaene-5,11-dicarbaldehyde
- SMILES
- [B-]1(N2C(=C(C(=C2C(=C3[N+]1=C(C(=C3C)C=O)C)C4=CC=CC=C4)C)C=O)C)(F)F
- InChIKey
- RCPWYTCJRFDFEH-UHFFFAOYSA-N
- InChI
- 1S/C21H19BF2N2O2/c1-12-17(10-27)14(3)25-20(12)19(16-8-6-5-7-9-16)21-13(2)18(11-28)15(4)26(21)22(25,23)24/h5-11H,1-4H3
- 5,5-difluoro-2,8-diiodo-1,3,7,9-tetramethyl-10-phenyl-5H-dipyrrolo[1,2-c:2',1'-f][1,3,2]diazaborinin-4-ium-5-uideCAS: 1083009-44-2 Formula: C19H17BF2I2N2 Molecular Weight: 575.968● In Stock — US warehouse, ships to EU* Item #: H302174View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2,2-difluoro-5,11-diiodo-4,6,10,12-tetramethyl-8-phenyl-3-aza-1-azonia-2-boranuidatricyclo[7.3.0.03,7]dodeca-1(12),4,6,8,10-pentaene
- SMILES
- [B-]1(N2C(=C(C(=C2C(=C3[N+]1=C(C(=C3C)I)C)C4=CC=CC=C4)C)I)C)(F)F
- InChIKey
- DLDOADVXWJCBOG-UHFFFAOYSA-N
- InChI
- 1S/C19H17BF2I2N2/c1-10-16(23)12(3)25-18(10)15(14-8-6-5-7-9-14)19-11(2)17(24)13(4)26(19)20(25,21)22/h5-9H,1-4H3
- 4，4'-(benzo[c][1，2，5]thiadiazole-4，7-diyl)dibenzaldehyde● In Stock — US warehouse, ships to EU* Item #: B304961View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 4-[4-(4-formylphenyl)-2,1,3-benzothiadiazol-7-yl]benzaldehyde
- SMILES
- C1=CC(=CC=C1C=O)C2=CC=C(C3=NSN=C23)C4=CC=C(C=C4)C=O
- InChIKey
- JDMIEZMXBAUTSW-UHFFFAOYSA-N
- InChI
- 1S/C20H12N2O2S/c23-11-13-1-5-15(6-2-13)17-9-10-18(20-19(17)21-25-22-20)16-7-3-14(12-24)4-8-16/h1-12H
- 5''-(4'-Amino-[1,1'-Biphenyl]-4-Yl)-[1,1':4',1'':3'',1''':4''',1''''-Quinquephenyl]-4,4''''-DiamineSolid ≥98%● In Stock — US warehouse, ships to EU* Item #: A302816View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 4-[4-[3,5-bis[4-(4-aminophenyl)phenyl]phenyl]phenyl]aniline
- SMILES
- C1=CC(=CC=C1C2=CC=C(C=C2)N)C3=CC(=CC(=C3)C4=CC=C(C=C4)C5=CC=C(C=C5)N)C6=CC=C(C=C6)C7=CC=C(C=C7)N
- InChIKey
- QEDIHRCMTOLXBO-UHFFFAOYSA-N
- InChI
- show more
- Synonyms
- 1,3,5-Tris[4’-Amino(1,1-Biphenyl-4-Yl)]Benzene
- 5(6)-Carboxy-Hexachlorofluorescein◐ .Made to order · 8–12 wks Item #: C302259View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- show more
- SMILES
- show more
- InChIKey
- IDBQIFUYJRVHOD-UHFFFAOYSA-N
- InChI
- show more
- 5(6)-Carboxyeosin◐ .Made to order · 8–12 wks Item #: C275086View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2-(2,4,5,7-tetrabromo-3-hydroxy-6-oxoxanthen-9-yl)benzene-1,3-dicarboxylic acid;2-(2,4,5,7-tetrabromo-3-hydroxy-6-oxoxanthen-9-yl)terephthalic acid
- SMILES
- show more
- InChIKey
- BEFSXKPEQVWGHQ-UHFFFAOYSA-N
- InChI
- show more
- Synonyms
- 5(6)-Carboxyeosin | 2-(2,4,5,7-tetrabromo-3-hydroxy-6-oxoxanthen-9-yl)benzene-1,3-dicarboxylic acid;2-(2,4,5,7-tetrab...
- 5-(Chlorosulfonyl)-2-ethoxybenzoic acid● In Stock — US warehouse, ships to EU* Item #: C302708View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 5-chlorosulfonyl-2-ethoxybenzoic acid
- SMILES
- CCOC1=C(C=C(C=C1)S(=O)(=O)Cl)C(=O)O
- InChIKey
- UHNRCKXZRULNSC-UHFFFAOYSA-N
- InChI
- 1S/C9H9ClO5S/c1-2-15-8-4-3-6(16(10,13)14)5-7(8)9(11)12/h3-5H,2H2,1H3,(H,11,12)
- Synonyms
- AKOS009266268 | CK2170 | 5-Chlorosulphonyl-2-ethoxybenzoic acid | SY107940 | 5- Chlorosulfonyl-2-ethoxybenzoic acid |...
- 5,6-dehydro Arachidonic Acid≥98% A solution in ethanol● In Stock — US warehouse, ships to EU* Item #: D334618View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- (8Z,11Z,14Z)-icosa-8,11,14-trien-5-ynoic acid
- SMILES
- CCCCCC=CCC=CCC=CCC#CCCCC(=O)O
- InChIKey
- GIOQWSLKUVKKAO-QNEBEIHSSA-N
- InChI
- 1S/C20H30O2/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19-20(21)22/h6-7,9-10,12-13H,2-5,8,11,14,17-19H2,1H3,(H,21,22)/b7-6-,10-9-,13-12-
- Synonyms
- Eicosa-cis-8,11,14-trien-5-ynoic acid | GIOQWSLKUVKKAO-QNEBEIHSSA-N | starbld0016500 | 8(Z),11(Z),14(Z)-eicosatrien-5...
- 5,6-Dihydro-4-hydroxy-6-methyl-4H-thieno[2,3-b]thiopyran-2-sulfonamide 7,7-DioxideCAS: 120279-26-7 Formula: C8H11NO5S3 Molecular Weight: 297.372● In Stock — US warehouse, ships to EU* Item #: D352422View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 4-hydroxy-6-methyl-7,7-dioxo-5,6-dihydro-4H-thieno[2,3-b]thiopyran-2-sulfonamide
- SMILES
- CC1CC(C2=C(S1(=O)=O)SC(=C2)S(=O)(=O)N)O
- InChIKey
- ZXSUWHJGLUHKPC-UHFFFAOYSA-N
- InChI
- 1S/C8H11NO5S3/c1-4-2-6(10)5-3-7(17(9,13)14)15-8(5)16(4,11)12/h3-4,6,10H,2H2,1H3,(H2,9,13,14)
- Synonyms
- AKOS015898688 | EX-A8006T | 5,6-Dihydro-4-hydroxy-6-methyl-4H-thieno(2,3-b)thiopyran-2-sulfonamide 7,7-dioxide | DTXS...
![5,5-difluoro-1,3,7,9-tetramethyl-10-phenyl-2,8-di(pyridin-4-yl)-5H-dipyrrolo[1,2-c:2',1'-f][1,3,2]diazaborinin-4-ium-5-uide](https://www.aladdinsci.com/media/catalog/product/cache/6360e336b2a70951114dbd37294096ee/H/3/H302422.png)
![5,5-difluoro-2,8-diformyl-1,3,7,9-tetramethyl-10-phenyl-5H-dipyrrolo[1,2-c:2',1'-f][1,3,2]diazaborinin-4-ium-5-uide](https://www.aladdinsci.com/media/catalog/product/cache/6360e336b2a70951114dbd37294096ee/H/3/H302718.png)
![5,5-difluoro-2,8-diiodo-1,3,7,9-tetramethyl-10-phenyl-5H-dipyrrolo[1,2-c:2',1'-f][1,3,2]diazaborinin-4-ium-5-uide](https://www.aladdinsci.com/media/catalog/product/cache/6360e336b2a70951114dbd37294096ee/H/3/H302174.png)
![4，4'-(benzo[c][1，2，5]thiadiazole-4，7-diyl)dibenzaldehyde - ≥98% CAS No(914651-17-5) by Aladdin Scientific](https://www.aladdinsci.com/media/catalog/product/cache/6360e336b2a70951114dbd37294096ee/B/3/B304961.png)
![5''-(4'-Amino-[1,1'-Biphenyl]-4-Yl)-[1,1':4',1'':3'',1''':4''',1''''-Quinquephenyl]-4,4''''-Diamine - ≥98% CAS No(1400987-00-9) by Aladdin Scientific](https://www.aladdinsci.com/media/catalog/product/cache/6360e336b2a70951114dbd37294096ee/A/3/A302816.png)
![5,6-Dihydro-4-hydroxy-6-methyl-4H-thieno[2,3-b]thiopyran-2-sulfonamide 7,7-Dioxide](https://www.aladdinsci.com/media/catalog/product/cache/6360e336b2a70951114dbd37294096ee/D/3/D352422.png)
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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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