Dear all, Chemspider lists an impressive array of ID's for other databases (without specifying which accession-Id belongs to which DB. -> rub it in CS :) )
Q: What projects are out there that provide, downloadable or otherwise(webservice), the resolution of chemical names into a comprehensive list of accession Id's. Ideally accession IDs for the major webservices out there. Pubchem does so to a limited degree (under the category 'Classification').
PS: My response from Chemspider, specifically inquiring ONLY the accession lists: "We don't make our database available as a download."
This service solved the issue - for the field of metabolomics: Chemical ID Resolver