For better or for worse, there are services available internationally which will manufacture experimental, unproven, compounds for unspecified uses.

Additionally, proprietary investigational compounds typically have their structure published in patents.

It's still a terribly bad idea to use experimental compounds no matter how bad when they haven't even finished safety trials - you wouldn't even be able to figure out what dosage is going to be effective without killing you. It's very easy to do far more harm than good. And typically past Phase 1 trials when this is characterized, compassionate use becomes a possibility.