# FAQ

## How to cite SureChEMBL?

If you mention SureChEMBL in your work, please cite:

Papadatos G, Davies M, Dedman N, Chambers J, Gaulton A, Siddle J, Koks R, Irvine SA, Pettersson J, Goncharoff N, Hersey A, Overington, JP. SureChEMBL: a large-scale, chemically annotated patent document database. Nucleic Acids Research, 2015;44(D1);D1220-D1228.

DOI: <https://doi.org/10.1093/nar/gkv1253> PMID: <https://europepmc.org/article/MED/26582922>

## Can I search a compound by SCHEMBL\_ID?

Yes. You can directly type your SCHEMBL\_ID in the url. e.g. <https://www.surechembl.org/chemical/2871> or <https://www.surechembl.org/chemical/SCHEMBL2871>

## Can I search a compound by InChI key?

While there is not yet a possibility to search directly by InChI key in SureChEMBL, you can use [UniChem](https://www.ebi.ac.uk/unichem/) to retrieve any SureChEMBL compound by InChI, InChI key or SCHEMBL\_ID.

<figure><img src="https://1396459327-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fty0JOfWwPnEbs5wW271w%2Fuploads%2FT5lZmRMVNTKqJrKXzego%2Fimage.png?alt=media&#x26;token=6d28adb7-5cb9-4583-bca9-efe52c8ffea2" alt=""><figcaption><p>Search by InChI key in UniChem. If the compound is in SureChEMBL, it will appear in the result lit</p></figcaption></figure>

<figure><img src="https://1396459327-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fty0JOfWwPnEbs5wW271w%2Fuploads%2FgpMaefTOPKRGKztPAowG%2Fimage.png?alt=media&#x26;token=e60b836c-daa0-4f18-a24b-f50aaa133302" alt=""><figcaption><p>Click on the corresponding link to see the compound in SureChEMBL</p></figcaption></figure>

## Can I download SureChEMBL to work offline?

Yes. The different ways of downloading SureChEMBL data are described in the [downloads](https://chembl.gitbook.io/surechembl/downloads) section.

## What license covers SureChEMBL data?

The SureChEMBL data are made available under a highly permissive [CC BY 4.0 license](https://creativecommons.org/licenses/by/4.0/deed.en).