Natural analgesic products capsaicin

As a final example of this concept, consider the natural product resiniferatoxin shown below. This compound comes from the latex of several flowering cactus species. Although it contains the same vanilloid group, it has a far more complex right-hand half. These structural changes yield a compound that is over 1000 times more potent than capsaicin and has been used as a natural analgesic for over two thousand years. 

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