Add more compounds ending in -ate, such as the sulfates, as in tungsten(IV) sulfate. They are real compounds that exist.
I would like to see more compounds that can be made with multiple elements, such as the sulfates with sulfur. There needs to be an extended list of all compounds that exist with different elements. In other words, I have to search the Internet for compounds that don't appear in the list of compounds with certain elements.
If you don't have the time to program the remaining compounds, I understand.