What is the dart frog toxin allegedly used to kill Alexei Navalny?

The toxin, epibatidine, can be found in frogs in the wild in South America or manufactured in a lab.

What is dart frog toxin, which is said to have been used to kill Alexei Navalny?

Epibatidine is about 100 times more potent than morphine, and derived from frogs native to South America ...

Assassination by frog? Scientists ponder a 'very surprising' report.

Poison dart frogs have fascinated researchers. Now their toxin has allegedly been linked to the death of Russian opposition leader Alexei Navalny.
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What is epibatidine, and how did it kill Navalny? A guide to the frog neurotoxin that five countries say poisoned Russia’s opposition leader.

The United Kingdom, Sweden, France, Germany, and the Netherlands announced that a substance called epibatidine killed Alexey Navalny, the opposition leader who died in a Russian prison in February ...

Kremlin had possession of frog poison used to kill Navalny, foreign secretary claims

Vladimir Putin’s Kremlin "has had possession" of the deadly frog toxin that was found in the body of Russian opposition ...

What is dart frog toxin, the ‘extremely rare’ neurotoxin allegedly used to kill Alexei Navalny?

Five European countries on Saturday accused Russia of ‘poisoning’ opposition leader Alexei Navalny in prison using a ‘rare ...