"experimental"@en . . . . . . . . "illicit"@en . "468-59-7"@en . . . "An opioid analgesic chemically related to and with an action resembling that of meperidine, but more rapid in onset and of shorter duration. It has been used in obstetrics, as pre-operative medication, for minor surgical procedures, and for dental procedures. (From Martindale, The Extra Pharmacopoeia, 30th ed, p1067)"@en . . . . . . . . . . . . . . "Betaprodine"@en . . . . . . . . . . .