Dimethylaminopivalophenone

Dimethylaminopivalophenone is an opioid analgesic. with a potency ½ that of morphine. It was initially discovered by Russian scientists in 1954 and subsequently rediscovered in the US in 1969. Its LD₅₀ in mice is 83 mg/kg. It has never been marketed commercially, likely due to its complicated synthesis, low potency, and lack of benefits compared to similarly potent opioid compounds.