[Answer] 4. Coffee was originally noted for, and is still popular because of, its energizing effect when consumed. What is the chemical that produces this effect?

Step 1 : Introduction to the question "4. Coffee was originally noted for, and is still popular because of, its energizing effect when consumed. What is the chemical that produces this effect?"

...1. ephedrine 2. caffeine 3. cocaine 4. nicotine While these are all stimulants, the one found in coffee is caffeine, a white crystalline xanthine alkaloid which was first discovered by the German chemist Friedrich Ferdinand Runge in 1819. Caffeine is found in the leaves, fruits and beans of a number of plants, where it acts as a natural pesticide that paralyzes and kills insects feeding on the plants. Coffee beans, tea leaves, guarana, yerba mate, chocolate and soft drinks made from kola beans (such as colas) are common dietary sources of caffeine.

Step 2 : Answer to the question "4. Coffee was originally noted for, and is still popular because of, its energizing effect when consumed. What is the chemical that produces this effect?"

caffeine:

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