Epibatidine is a chlorinated alkaloid that is secreted by the Ecuadorian frog Epipedobates anthonyi and poison dart frogs from the genus Ameerega. It was discovered by John W. Daly in 1974, but its structure was not fully elucidated until 1992. Whether epibatidine occurs naturally remains controversial due to challenges in conclusively identifying the compound from the limited samples collected by Daly. By the time that high-resolution spectrometry was used in 1991, there remained less than one milligram of extract from Daly's samples, raising concerns about possible contamination. Samples from other batches of the same species of frog failed to yield epibatidine. - Source: Wikipedia
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