Each datasource has one table, including at least the following fields:
compound identifier (Primary CID)
compound structure (InChi, canonical SMILES)
target identifier ( Uniprot or gene name or entrez gene ID or EC number)

compound name, casNO, compound properties
target name, sequence info,
interaction type
binding affinity

One table summerizes the provenance of all the datasource, including:
datasource name
corresponding table name
the link of datasource
download date