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-Methoxypyrazin-2-amineSolid ≥98%◐ .Made to order · 8–12 wks Item #: M339849View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 5-methoxypyrazin-2-amine
- SMILES
- COC1=NC=C(N=C1)N
- InChIKey
- BWXBZAOCBVXFMQ-UHFFFAOYSA-N
- InChI
- 1S/C5H7N3O/c1-9-5-3-7-4(6)2-8-5/h2-3H,1H3,(H2,6,7)
- Synonyms
- MFCD09909647 | BBL104100 | 5-methoxypyrazin-2-amine | A7850 | 2-Pyrazinamine,5-methoxy- | SCHEMBL619998 | AKOS0051461...
- 5-Methyl-1,1,1-trifluoro-2,4-hexanedioneCAS: 30984-28-2 Formula: C7H9F3O2 Molecular Weight: 182.14● In Stock — US warehouse, ships to EU* Item #: M341372View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 1,1,1-trifluoro-5-methylhexane-2,4-dione
- SMILES
- CC(C)C(=O)CC(=O)C(F)(F)F
- InChIKey
- LOTZGJDCTDDVCS-UHFFFAOYSA-N
- InChI
- 1S/C7H9F3O2/c1-4(2)5(11)3-6(12)7(8,9)10/h4H,3H2,1-2H3
- Synonyms
- 1,1,1-Trifluoro-5-methyl-2,4-hexanedione | 1,1,1-Trifluoro-5-methylhexane-2,4-dione | 5-Methyl-1,1,1-trifluorohexane-...
- 5-Methyl-2,3-dihydro-1,3-benzoxazole-2-thione● In Stock — US warehouse, ships to EU* Item #: M341391View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 5-methyl-3H-1,3-benzoxazole-2-thione
- SMILES
- CC1=CC2=C(C=C1)OC(=S)N2
- InChIKey
- SSWZUOXLFTXIEZ-UHFFFAOYSA-N
- InChI
- 1S/C8H7NOS/c1-5-2-3-7-6(4-5)9-8(11)10-7/h2-4H,1H3,(H,9,11)
- Synonyms
- 5-METHYL-BENZOOXAZOLE-2-THIOL | Z56864608 | AKOS005173574 | EN300-77013 | MFCD00052492 | SSWZUOXLFTXIEZ-UHFFFAOYSA-N ...
- 5-Methyl-2-[(2-nitrophenyl)amino]-3-thiophenecarboxylic Acid Methyl EsterCAS: 72242-31-0 Formula: C13H12N2O4S Molecular Weight: 292.31● In Stock — US warehouse, ships to EU* Item #: M339521View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- methyl 5-methyl-2-(2-nitroanilino)thiophene-3-carboxylate
- SMILES
- CC1=CC(=C(S1)NC2=CC=CC=C2[N+](=O)[O-])C(=O)OC
- InChIKey
- ATSANGLCFQGIMM-UHFFFAOYSA-N
- InChI
- 1S/C13H12N2O4S/c1-8-7-9(13(16)19-2)12(20-8)14-10-5-3-4-6-11(10)15(17)18/h3-7,14H,1-2H3
- Synonyms
- Methyl 5-methyl-2-((2-nitrophenyl)amino)thiophene-3-carboxylate | Methyl 2-(2-nitroanilino)-5-methvlthiophene-3-carbo...
- 5-Methyl-2-pyridin-2-yl-1H-benzoimidazoleCAS: 7471-12-7 Formula: C13H11N3 Molecular Weight: 209.2510mM in DMSO● In Stock — US warehouse, ships to EU* Item #: M425806View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 6-methyl-2-pyridin-2-yl-1H-benzimidazole
- SMILES
- CC1=CC2=C(C=C1)N=C(N2)C3=CC=CC=N3
- InChIKey
- HFYFOFMVURXVSD-UHFFFAOYSA-N
- InChI
- 1S/C13H11N3/c1-9-5-6-10-12(8-9)16-13(15-10)11-4-2-3-7-14-11/h2-8H,1H3,(H,15,16)
- Synonyms
- 5-methyl-2-pyridin-2-yl-1(3)H-benzoimidazole | UNII-9RVR7V4EAG | 6-methyl-2-pyridin-2-yl-1H-benzimidazole | 6-methyl-...
- 5-Methyl-4-oxo-3,4-dihydro-thieno[2,3-d]pyrimidine-6-carboxylic acidCAS: 101667-97-4 Formula: C8H6N2O3S Molecular Weight: 210.21● In Stock — US warehouse, ships to EU* Item #: M340581View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 5-methyl-4-oxo-3H-thieno[2,3-d]pyrimidine-6-carboxylic acid
- SMILES
- CC1=C(SC2=C1C(=O)NC=N2)C(=O)O
- InChIKey
- CYNGLBSDKJIAOD-UHFFFAOYSA-N
- InChI
- 1S/C8H6N2O3S/c1-3-4-6(11)9-2-10-7(4)14-5(3)8(12)13/h2H,1H3,(H,12,13)(H,9,10,11)
- Synonyms
- CCG-125304 | 5-methyl-4-oxo-3,4-dihydro-thieno-[2,3-d]pyrimidine-6-carboxylic acid | 5-Methyl-4-oxo-3,4-dihydro-thien...
- 5-MethylcytidineCAS: 2140-61-6 Formula: C10H15N3O5 Molecular Weight: 257.2410mM in DMSO● In Stock — US warehouse, ships to EU* Item #: M422586View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 4-amino-1-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]-5-methylpyrimidin-2-one
- SMILES
- CC1=CN(C(=O)N=C1N)C2C(C(C(O2)CO)O)O
- InChIKey
- ZAYHVCMSTBRABG-JXOAFFINSA-N
- InChI
- 1S/C10H15N3O5/c1-4-2-13(10(17)12-8(4)11)9-7(16)6(15)5(3-14)18-9/h2,5-7,9,14-16H,3H2,1H3,(H2,11,12,17)/t5-,6-,7-,9-/m1/s1
- Synonyms
- NSC-363933 | M1931 | s6138 | 5-Methylcytidine | 5-methyl-cytidine | DTXSID401016977 | 4-amino-1-[(2R,3R,4S,5R)-3,4-di...
- 5-Nitro-2,6-dioxo-1,2,3,6-tetrahydropyrimidine-4-carboxylic acidCAS: 17687-24-0 Formula: C5H3N3O6 Molecular Weight: 201.09Solid ≥97%● In Stock — US warehouse, ships to EU* Item #: N305200View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 5-nitro-2,4-dioxo-1H-pyrimidine-6-carboxylic acid
- SMILES
- C1(=C(NC(=O)NC1=O)C(=O)O)[N+](=O)[O-]
- InChIKey
- OPGJGRWULGFTOS-UHFFFAOYSA-N
- InChI
- 1S/C5H3N3O6/c9-3-2(8(13)14)1(4(10)11)6-5(12)7-3/h(H,10,11)(H2,6,7,9,12)
- Synonyms
- MFCD00129736 | BETA-FLUOROPYRUVICACIDSODIUMSALT | 5-nitro-2,6-dioxo-1,2,3,6-tetrahydropyrimidine-4-carboxylic acid | ...
- 5-Nitro-2-(4-nitrophenyl)-1H-benzoimidazoleCAS: 1772-39-0 Formula: C13H8N4O4 Molecular Weight: 284.231◐ .Made to order · 8–12 wks Item #: N341767View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 6-nitro-2-(4-nitrophenyl)-1H-benzimidazole
- SMILES
- C1=CC(=CC=C1C2=NC3=C(N2)C=C(C=C3)[N+](=O)[O-])[N+](=O)[O-]
- InChIKey
- XJIPBORERCFIIP-UHFFFAOYSA-N
- InChI
- 1S/C13H8N4O4/c18-16(19)9-3-1-8(2-4-9)13-14-11-6-5-10(17(20)21)7-12(11)15-13/h1-7H,(H,14,15)
- Synonyms
- 2-(p-nitrophenyl)-5-nitrobenzimidazole | EINECS 217-200-0 | AB00080421-01 | NCI60_019807 | BDBM50541104 | cid_74495 |...
- 5-Phenyl-thieno[2,3-d]pyrimidine-4-thiol● In Stock — US warehouse, ships to EU* Item #: P340540View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 5-phenyl-3H-thieno[2,3-d]pyrimidine-4-thione
- SMILES
- C1=CC=C(C=C1)C2=CSC3=C2C(=S)NC=N3
- InChIKey
- LNOFOMVIGAWPSJ-UHFFFAOYSA-N
- InChI
- 1S/C12H8N2S2/c15-11-10-9(8-4-2-1-3-5-8)6-16-12(10)14-7-13-11/h1-7H,(H,13,14,15)
- Synonyms
- EN300-04138 | MLS000562797 | MFCD01911682 | AB00979376-01 | WAY-358667-A | IFLab1_003325 | AKOS000266913 | 5-phenylth...
- 5-PentadecylresorcinolSolid ≥95%● In Stock — US warehouse, ships to EU* Item #: P339807View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 5-pentadecylbenzene-1,3-diol
- SMILES
- CCCCCCCCCCCCCCCC1=CC(=CC(=C1)O)O
- InChIKey
- KVVSCMOUFCNCGX-UHFFFAOYSA-N
- InChI
- 1S/C21H36O2/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-19-16-20(22)18-21(23)17-19/h16-18,22-23H,2-15H2,1H3
- Synonyms
- 5-Pentadecyl-1,3-benzenediol | Adipostatin A | 1,3-Dihydroxy-5-pentadecylbenzene
- 5-Oxo-DL-proline-d5CAS: 352431-30-2 Formula: C5H2D5NO3 Molecular Weight: 134.14◐ .Made to order · 8–12 wks Item #: O339813View ProductPricing & Pack Sizes
Technical Identifiers
- IUPAC Name
- 2,3,3,4,4-pentadeuterio-5-oxopyrrolidine-2-carboxylic acid
- SMILES
- C1CC(=O)NC1C(=O)O
- InChIKey
- ODHCTXKNWHHXJC-UXXIZXEISA-N
- InChI
- 1S/C5H7NO3/c7-4-2-1-3(6-4)5(8)9/h3H,1-2H2,(H,6,7)(H,8,9)/i1D2,2D2,3D
- Synonyms
- DL-2-Pyrrolidinone-3,3,4,4,5-d5-5-carboxylic Acid | Pyrrolidinonecarboxylic Acid-d5
![5-Methyl-2-[(2-nitrophenyl)amino]-3-thiophenecarboxylic Acid Methyl Ester - 95%, used for , CAS No. 72242-31-0, by Aladdin Scientific](https://www.aladdinsci.com/media/catalog/product/cache/6360e336b2a70951114dbd37294096ee/M/3/M339521.png)
![5-Methyl-4-oxo-3,4-dihydro-thieno[2,3-d]pyrimidine-6-carboxylic acid](https://www.aladdinsci.com/media/catalog/product/cache/6360e336b2a70951114dbd37294096ee/M/3/M340581.png)
![5-Phenyl-thieno[2,3-d]pyrimidine-4-thiol - 95%, used for , CAS No. 182198-89-6, by Aladdin Scientific](https://www.aladdinsci.com/media/catalog/product/cache/6360e336b2a70951114dbd37294096ee/P/3/P340540.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.
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.
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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.