Mystery Theme II by SokolM

Question 1

What now-common food additive was discovered by accident in 1965 when James M. Schlatter, a chemist working for G.D. Searle & Company, realized its taste when he licked his fingers to help grip a piece of paper? His fingers had been exposed to this compound, which has been marketed under trade names such as Equal, during an intermediary step while trying to generate a tetrapeptide of the hormone gastrin for help in evaluating an anti-ulcer drug candidate.