| 1 | Molfinder | Curator Data | 4 |
| 2 | Matrix Scientific | Chemical Vendor | 66428 |
| 3 | Key Organics Ltd | Chemical Vendor | 8077 |
| 4 | Maybridge | Chemical Vendor | 5776 |
| 5 | MP Biomedicals | Chemical Vendor | 17240 |
| 6 | Adesis Inc. | Chemical Vendor | 1576 |
| 7 | DrugBank | Academic Database | 6586 |
| 8 | Apollo Scientific Ltd | Chemical Vendor | 42151 |
| 9 | Selleck Chemicals | Chemical Vendor | 2375 |
| 10 | Chemical Entities of Biological Interest | Academic Database | 49485 |
| 11 | Life Chemicals | Chemical Vendor | 7817 |
| 12 | InterBioScreen | Chemical Vendor | 61791 |
| 13 | Shanghai Lingjing Industrial | Chemical Vendor | 27 |
| 14 | Wikipedia.org | Academic Database | 8560 |
| 15 | Sigma Aldrich | Chemical Vendor | 75210 |
| 16 | Toronto Research Chemicals | Chemical Vendor | 27198 |
| 17 | PubChem Compound | Academic Database | 299775 |
| 18 | Chembase FastQuote | Personal Data | 64 |
| 19 | Chemik Co. Ltd | Chemical Vendor | 4449 |
| 20 | Enamine LLC | Chemical Vendor | 534435 |
| 21 | Bide Pharmatech Ltd. | Chemical Vendor | 25693 |
| 22 | Beijing Advanced Technology Co. Ltd. | Chemical Vendor | 55 |
| 23 | Alfa Aesar | Chemical Vendor | 32344 |
| 24 | BioBioPha Co., Ltd. | Chemical Vendor | 2847 |
| 26 | ChemBridge Corporation | Chemical Vendor | 547339 |
| 27 | A&J Pharmtech Co. Ltd. | Chemical Vendor | 40562 |
| 28 | Shanghai T&W Pharmaceutical Co., Ltd | Chemical Vendor | 90 |
| 29 | RCSB Protein Data Bank | Academic Database | 1 |