Question: Which opioid along with Subutex makes up the two best known of the thevinol, orvinol, or bridged oripavine derivatives?
Sentence (from "Bentley compounds"): Buprenorphine and etorphine are perhaps the best known of the family, which was the first series of extremely potent μ-opioid agonists, with some compounds in the series having over many thousands of times the analgesic potency of morphine.
Relevant evidence: Yes