[Bioperl-l] Finding all bioactive substances through EUtils or PUG_SOAP

[bar tomas]

Hi,

Could you give me a hint on how to query Entrez databases to find all
substances that have been found to be bioactive through a bioassay
screening.
I've looked at the wsdl file for querying pubchem (*
http://pubchem.ncbi.nlm.nih.gov/pug_soap/pug_soap.cgi?wsdl* ) but have found
no service for retrieving substance ids.
Is there a way to do this with EUtils or a http query with parameters ?
Thanks a lot.
Tomas B.