Chemical Entities of Biological Interest (ChEBI) is a freely available dictionary of molecular entities focused on small chemical compounds. The paper is: The ChEBI reference database and ontology for biologically relevant chemistry: enhancements for 2013. Hastings J, de Matos P, Dekker A, Ennis M, Harsha B, Kale N, Muthukrishnan V, Owen G, Turner S, Williams M, Steinbeck C. Nucleic Acids Res. 2013 Jan;41(Database issue):D456-63. doi: 10.1093/nar/gks1146. Epub 2012 Nov 24. We are grateful to the authors for creating and maintaining this resource and for allowing us to incorporate its structures in ZINC.
We assess the chemical diversity of a subset by clustering the molecules. First, we sort ligands by increasing molecular weight. Then, we use the SUBSET 1.0 algorithm ( Voigt JH, Bienfait B, Wang S, Nicklaus MC. JCICS, 2001, 41, 702-12) to progressively select compounds that differ from those previously selected by at least the Tanimoto cutoff, using ChemAxon default fingerprints. The resulting representatives have two interesting properties:
|Tanimoto Cutoff Level||60%||70%||80%||90%||100%|
|Number of Representatives||1,963||3,493||5,754||9,151||23,523|
We compute the physical properties of each molecule in the subset, and graph them below.
Download Calculated Physical Properties
|Format||Reference(pH 7)||Mid(pH 6-8)||High(pH 8-9.5)||Low(pH 4.5-6)||Download
|MOL2||All||All||All||All||Single Usual Metals All||Single Usual Metals All|
|SDF||All||All||All||All||Single Usual Metals All||Single Usual Metals All|
|Flexibase||Not Available||Not Available||Not Available||Not Available|