Table 1 Example of a molecular formula search for C15H12O7 in different chemical databases. Search date: July 2007
Database name | Compounds found | Total database entries |
|---|---|---|
Chemical Abstracts (CAS) | 181 | 24,000,000 |
Beilstein Database (MDL) | 166 | 8,000,000 |
Dictionary of Natural Products (DNP) | 129 | 170,000 |
PubChem (NIH) | 19 | 800,000 |
Available Chemicals Directory (MDL) | 6 | 400,000 |
ChemIDplus (NIH) | 6 | 370,000 |
KEGG (Kyoto University) | 3 | 13,000 |
NIST05 (NIST mass spectral database) | 2 | 163,000 |
MOLGEN molecular isomer generator (allowing 2 benzene groups; 1 ether group, 1 keto group; 5 hydroxy groups) | 788,000 | - |