you need to use a special Galaxy instance that is focused on cheminformatics. Please have a look at:
and here is a Docker container with all the tools you will need, including drug-ability predictions, similarity search and various chemical property calculations.
Hope this helps,
You can have a look at "Chemical Annotation Retrieval Toolkit" from http://cart.embl.de/.
It is possible to query drug names to find the PUBCHEM IDs. Then, you can retrieve various chemicals annotations together with the enriched terms.