the time, however, and the structure of strychnine was elucidated over100 years later in 1947 by the English chemist, Sir Robert Robinson,and coworkers. The total synthesis of the compound was achieved in1963 by the American chemist, R.B. Woodward, and coworkers. Theirsuccessful studies with strychnine were crowning achievements of veryproductive careers for Robinson and Woodward, and both received NobelPrizes in Chemistry shortly after the publication of their work on thisfamous natural product.The biological activity and mode of action of strychnine have been thesubjects of many studies since the compound was purified at the beginningof the nineteenth century. Strychnine is considered to be one of the bitterestsubstances known, with a detectable limit of as low as 1 ppm by weight inwater. By stark contrast, the taste threshold for sucrose is nearly 2,000 ppmfor humans. This very strong bitterness is thought to contribute to its
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