Are there any compound lists searchable by elemental content? As I say in the question, I am looking for lists of compounds that I can search based on elemental content. Essentially, I want to find candidate compounds for boron doping liquid scintillator, we have a few likely candidates already but we want to see the available chemical space and see if there are better/cheaper candidates. I want to avoid high electron densities, so essentially I want to find compounds that only have boron, carbon, and hydrogen. I will filter later for hazard/reactivity/flammability.

Does such a list / service exist? If not, is there a general list of compounds with their formulas that I could then parse with a python script or something?
After some more searching, followed by asking reddit, I got a few good suggestions.
ChemSpider's advanced search method allows you to, among other things, search for elements containing specific elements and lacking other elements.

Also, for large lists of compounds I can use python tools to extract the tables from the CRC Handbook pdfs and then, search that data.