Zenodo General-purpose open-access repository developed under the European OpenAIRE program and operated by CERN
EUDAT CDI EUDAT CDI is a pan-European network consisting of more than 25 research organisations, data and computing centers.
ChemSpider ChemSpider is a free chemical structure database providing fast text and structure search access to over 100 million structures from hundreds of data sources
PubChem PubChem is an open chemistry database at the National Institutes of Health (NIH).